Induced gas liquid coalescer and flotation separator

A method for separating suspended impurities from contaminated liquids comprising:

• providing a vessel having an expanded chamber with inlet and outlet means for fluid flow;
• inducing gas into a contaminated liquid influent;
• contacting suspended impurities with fine gas bubbles formed at the eductor means;
• introducing the gas induced influent into a liquid zone of the expanded vessel chamber through at least one riser tube containing coalescent means;
• releasing the gas induced influent into the liquid below the liquid surface;
• controlling the liquid level;
• floating the forth laden impurities to a collection zone in an upper portion of the vessel;
• withdrawing the resulting clarified liquid from a lower portion of the liquid zone;
• and
• collecting the gas for recirculation.

An apparatus for removing suspended impurities from contaminated liquid, comprising:

• a substantially vertically positioned cylindrical, gas tight fluid flow vessel defining a chamber with an upper end portion gas collection and froth laden impurity collection zone with the remainder of the chamber defining a liquid flow portion;
• educting means for inducing gas into the contaminated liquid having suspended impurities;
• the educting gas means having a gas inlet conduit and a chamber wherein a mixture of said induced gas and liquid is achieved with maximum dispersion of gas through the contaminated liquid;
• means for introducing a flow of the gas induced contaminated liquid into said chamber;
• an outlet means for flowing clarified liquids from a lower portion zone of the chamber;
• the educting gas means in communication with a coalescer riser tube positioned substantially in axial alignment with the axis of the chamber within the vessel chamber, the riser tube having a coalescer pack in an upper portion thereof, the coalescer riser tube in open communication with the liquid contained in the vessel chamber at a point below the liquid level;
• means for recirculating or removing gas collected within the upper gas collection portion;
• and
• means in fluid communication with said upper portion gas collection zone for removing generated froth laden contaminants from said chamber.

A method for separating suspended impurities from contaminated liquids wherein the contaminated liquids have high particulate matter content comprising;

• providing a vessel having an expanded chamber with inlet and outlet means for fluid flow;
• inducing gas into a recycled clarified liquid stream;
• introducing the gas induced clarified liquid parallel to the introduction of contaminated influent liquid into a liquid zone of the expanded vessel chamber through at least one riser tube containing coalescent means in tandem;
• releasing the gas induced clarified liquid and contaminated liquid influent into the vessel liquid below the vessel liquid surface;
• contacting suspended impurities with fine gas bubbles formed at the eductor means;
• controlling the liquid level;
• floating the froth laden impurities into a collection zone in an upper portion of the vessel;
• withdrawing the resulting clarified liquid from a lower portion of the liquid zone for release;
• and collecting the gas for recirculation.

An apparatus for removing suspended impurities from contaminated liquid, comprising a substantially vertical position cylindrical, gas tight fluid flow vessel defining a chamber with an upper end portion gas collection and froth laden impurity collection zone with the remainder of the chamber defining a liquid flow portion;

• educting means for inducing gas into recycled clarified liquid;
• the educting gas means having a gas inlet conduit and a chamber wherein a mixture of said induced gas and clarified liquid is achieved with maximum dispersion of gas through the clarified liquid;
• means for introducing a flow of gas induced clarified liquid into said chamber;
• means for introducing contaminated liquid flow in a flow parallel and proximal to the gas induced clarified liquid chamber path;
• an outlet means for flowing clarified liquids from a lower portion of the zone;
• an outlet means for recycling clarified liquid from a lower portion zone of the chamber;
• the vessel chamber having a riser tube substantially in axial alignment with the axis of the chamber within the vessel chamber, the riser tube containing coalescent means, the riser tube receiving both gas induced clarified liquid and contaminated liquid at the lower portion of the chamber and the riser tube being in open communication with the liquid contained in the vessel chamber at a point below the liquid level;
• means for recycling and removing gas collected within the upper gas collection portion;
• and
• means in fluid communication with said upper portion gas collection zone for removing generated froth laden contaminants from said chamber.