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AssigneeElysis Limited Partnership
InventorsMichael Meyer, Roy A. Glisan
Estimating the term…
Apparatus and method for collecting and pretreating process gases produced in an electrolytic cell during aluminum production are disclosed. The apparatus comprises a collecting unit configured to draw off primary process gases from the electrolytic cell, for instance by drawing-off primary process gases from orifices purposely made over the electrolytic bath; and a pre-treating unit fluidly connected to the collecting unit and configured to receive a fluid bed of fluorinated alumina for pre-treating the primary process gases. The collecting and pre-treating units are within or immediately aside the electrolytic cell, in the potroom. The apparatus can be combine with a gas treatment center (GTC) located outside the potroom. Among other advantages, the technology allows collecting primary process gases directly at electrolytic bath level, separating primary process gases and hoodspace process gases to pretreat the primary process gases with alumina before the GTC, and using fluid bed reactors without filter bags.
An apparatus for collecting and pre-treating primary process gases produced in one or more electrolytic cells during the production of aluminum, each of said one or more electrolytic cell comprising an electrolytic bath, the apparatus comprising:
A method for collecting and pre-treating primary process gases produced in one or more electrolytic cells during the production of aluminum, each of said one or more electrolytic cell comprising an electrolytic bath, the method comprising:
A method for treating process gases generated by one or more electrolysis cells, each of said one or more electrolytic cell comprising an electrolytic bath, the method comprising the following steps:
The method according to 15, wherein the pre-treating step c) comprises driving the primary process gases through a fluid bed of fluorinated alumina.
The method according to 16, further comprising the step of exhausting pre-treated primary process gases in an upper part of the fluid bed before being combined with the hoodspace process gases.
Dependencies are inferred from the claim text.