Treatment stages for selenium removal

Patent metadata

Field	Value
Publication number	US-9266755-B2
Application number	US-201314020388-A
Country	US
Kind code	B2
Filing date	Sep 6, 2013
Priority date	Feb 25, 2010
Publication date	Feb 23, 2016
Grant date	Feb 23, 2016

Abstract

Methods and apparatus relate to treating fluid to at least reduce selenium content within the fluid. The treating includes conditioning stages to alter a composition of the fluid prior to removal of the selenium content from the fluid. The composition of the fluid after the conditioning stages facilitates the removal of the selenium content or at least limits detrimental impact to selenium removal efficiency.

First claim

The invention claimed is:

1. A selenium removal system for removing selenium from a fluid, comprising:
A solids removal unit for processing a fluid;
An oils removal unit coupled to receive the fluid from the solids removal unit;
A soluble organics removal unit coupled to receive the fluid from the oils removal unit;
A thiosulfate removal unit coupled to receive the fluid from the soluble organics removal unit;
A selenium removal unit coupled to receive the fluid from the thiosulfate removal unit, said selenium removal unit further comprising a sorbent tellurium material; and
A polish treatment unit coupled to receive the fluid from the selenium removal unit, the polish treatment unit to remove residual constituents that might otherwise prevent recycling of the fluid.

2. The selenium removal system according to claim 1 , further comprising:
a reducing agent injector coupled to receive the aqueous stream from the selenium removal unit 208 .

3. The selenium removal system according to claim 1 , further comprising:
a selenium precipitate remover coupled to receive the fluid from the selenium removal unit.

4. The selenium removal system according to claim 1 , further comprising:
a reducing agent injector coupled to receive the fluid from the selenium removal unit; and
a selenium precipitate remover coupled to receive the fluid from the reducing agent injector.

5. The selenium removal system according to claim 1 , further comprising:
a sorbent selenium material used in the selenium removal unit.

6. The selenium removal system according to claim 1 , further comprising:
a sorbent sulfur material used in the selenium removal unit.

Assignees

• Phillips 66 Co

Inventors

• Hughes Mark A
• Lord Iii Charles J
• Randolph Bruce B
• Cross Joe B
• Kalakkunnath Sumod
• Corbett Mike K
• Goenner Roger K
• Reed Larry E

Classifications

• C02F1/285

  using synthetic organic sorbents · CPC title

• C02F9/00 Primary

  Multistage treatment of water, waste water or sewage · CPC title

• C02F2101/32

  Hydrocarbons, e.g. oil · CPC title

• B01J20/3204

  Inorganic carriers, supports or substrates · CPC title

• C02F1/58 Primary

  by removing specified dissolved compounds (using ion-exchange C02F1/42; softening water C02F5/00) · CPC title