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US 12,006,582 B2Granted
Apparatus and method for controlled alumina supply
AssigneeREEL Alesa AG
InventorsAnders Kenneth Sorhuus, Sivert Ose
Life of this patent
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Abstract
An apparatus and a method are useful for removing pollutants from process effluent gas produced by an electrolytic cell used in an aluminum production plant to produce aluminum. The apparatus and method use a flow control device to control alumina supply to an electrolytic cell and to a dry scrubber contact reactor.
Claims15
An effluent gas treatment system (26) comprising:
- a dedicated effluent gas treatment system (26) arranged a level vertically above that of an aluminum electrolytic cell (14);
- a housing (60) having an at least partially porous bottom (60 A) and defining an interior area (62) of the dedicated effluent gas treatment system (26);
- a flow control device (64) arranged vertically within the interior area (62) comprising an elongated hollow first portion (68) and a tapered second portion (78), the flow control device (64) arranged a predetermined distance (D) from the at least partially porous bottom (60 A) of the housing (60);
- an adsorbent hopper (24) extending across the at least partially porous bottom (60 A) of the housing (60) between the flow control device (64) and a dry scrubber contact reactor (46);
- a feeding pipe (30) fluidly connected between the adsorbent hopper (24) and the aluminum electrolytic cell (14) for supplying adsorbent (A) to the aluminum electrolytic cell (14);
- and
- an effluent gas outlet (104) in a cell housing (36) for the aluminum electrolytic cell (14), fluidly connected to the dry scrubber contact reactor (46) for interaction of the effluent gas (EG) with adsorbent (A) supplied from the adsorbent hopper (24) to produce contacted gas (CG).
4 more elements
A flow control device (64) comprising:
- a vertically arranged elongated hollow first portion (68) having an open bottom end (76) and an open top end (70);
- a vertically arranged second portion (78) defining an open interior area (80), the second portion (78) comprising a tapering wall (84) extending between a base edge (82) and a connection top (86), wherein the connection top (86) is fluidly connected to the open bottom end (76) of the first portion (68);
- an adsorbent supply (72) fluidly connected to the open top end (70) of the first portion (68);
- and
- a portion of an adsorbent hopper (24) arranged a predetermined distance (D) vertically below the flow control device (64);
- wherein the flow control device (64) is mechanically operable to control a rate of supply of adsorbent (A) to a dry scrubber contact reactor (46) based on a rate of adsorbent (A) demand by an aluminum electrolytic cell (14).
3 more elements
A method of using a flow control device (64) comprising:
- providing the flow control device (64) assembled by:
- vertically arranging an elongated hollow first portion (68) having an open bottom end (76) and an open top end (70);
- vertically arranging a second portion (78) defining an open interior area (80), the second portion (78) comprising a tapered wall (84) extending between base edge (82) and a connection top (86), wherein the connection top (86) is fluidly connected to the open bottom end (76) of the first portion (68);
- fluidly connecting an adsorbent supply (72) to the open top end (70) of the first portion (68);
- and
- arranging a portion of an adsorbent hopper (24) at a predetermined distance (D) vertically below the flow control device (64);
- and
- operating the flow control device (64) to control a rate of supply of adsorbent (A) to a dry scrubber contact reactor (46) based on a rate of adsorbent (A) demand by an aluminum electrolytic cell (14).
5 more elements
Dependencies are inferred from the claim text.