Fluids, solids and heavy component removal from reclaimer process liquid streams

1 . A process for recovering a processing liquid from a feed stream, said process comprising:

providing a feed stream comprising processing liquid, from 1 to 85 wt % water, and dissolved solids;

adjusting the pH of said feed stream to a pH greater than 9 to induce formation of solids;

introducing at least a portion of said feed stream into a solids/liquids/liquids disc centrifuge to produce a discharge stream containing solids and a clarified stream;

introducing a first portion of said clarified stream into a reclaiming system to produce a stream comprising purified processing liquid and a residuum stream comprising solids;

recycling a second portion of said clarified stream to said feed stream; and

introducing said clarified stream into a clarifier prior to recycling a second portion of said clarified stream.

2 . The process of claim 1 , wherein said pH is adjusted by introducing a pH adjusting additive having a basic pH.

3 . The process of claim 2 , wherein said pH adjusting additive comprises alkali hydroxides, alkaline earth metal hydroxides, alkali carbonates, alkaline earth metal carbonates, calcium hydroxide, magnesium hydroxide, sodium hydroxide, potassium hydroxide, calcium carbonate, magnesium carbonate, sodium carbonate, potassium carbonate, or mixtures thereof.

4 . The process of claim 3 , wherein said pH adjusting additive comprises an aqueous mixture comprising 2-40 wt % of a hydroxide and 1-10 wt % of a carbonate.

5 . A process for recovering a processing liquid from a feed stream, said process comprising:

providing a feed stream comprising processing liquid, from 1 to 85 wt % water, and dissolved solids;

adjusting the pH of said feed stream to a pH greater than 9 to induce formation of solids;

introducing at least a portion of a feed stream into a first solids/liquids/liquids disc centrifuge to produce a first discharge stream containing solids and a first clarified stream;

introducing a first portion of said first clarified stream into a reclaiming system to produce a stream comprising purified processing liquid and a residuum stream comprising solids;

introducing at least a portion of said residuum stream into a second solids/liquids/liquids disc centrifuge to produce a second discharge stream containing solids and a second clarified stream;

recycling a second portion of said first clarified stream to said feed stream; and

introducing said first clarified stream into a clarifier prior to recycling a second portion of said first clarified stream.

6 . The process of claim 5 , further comprising:

introducing a diluent into said residuum stream prior to introducing said residuum stream into said second centrifuge.

7 . The process of claim 6 , wherein said diluent comprises the feed stream.

8 . The process of claim 5 , wherein said pH is adjusted by introducing a pH adjusting additive having a basic pH.

9 . The process of claim 8 , wherein said pH adjusting additive comprises alkali hydroxides, alkaline earth metal hydroxides, alkali carbonates, alkaline earth metal carbonates, calcium hydroxide, magnesium hydroxide, sodium hydroxide, potassium hydroxide, calcium carbonate, magnesium carbonate, sodium carbonate, potassium carbonate, or mixtures thereof.

10 . The process of claim 9 , wherein the additives comprise an aqueous mixture comprising 2-40 wt % of a hydroxide and 1-10 wt % of a carbonate.

11 . The process of claim 5 , further comprising:

removing bottoms fluid from said clarifier and introducing it into said second centrifuge.

12 . The process of claim 5 , further comprising:

recycling at least a portion of said second clarified stream to said feed stream.