Siemens Energy, Inc.

Zimpro/passavant Inc.

Zimpro Environmental, Inc.

Claude E Ellis

Bruce L Brandenburg

Simon Larson

Curtis D Cooley

William W Cunningham

Russell D Roberts

There are provided herein methods and systems for increasing efficiency in a multi-stage activated carbon system. The methods and systems provide a cleaned carbon solids fraction and a waste liquor from wet air regeneration, and direct the same to a second stage and a first stage, respectively, of the multi-stage activated carbon system to enhance removal efficiency therein.

Multi-stage activated carbon systems and processes with recycled streams

A water treatment system () incorporating a solubles concentration reduction device () between a powdered activated carbon treatment (PACT) system () and a wet air regeneration (WAR) system (). Soluble components may be removed by sequentially dewatering () then re-slurrying () spent carbon sludge (). The reduced concentration of soluble materials reduces the need for scale removal maintenance and eliminates the necessity for exotic materials of construction of the WAR system components. The solubles concentration reduction device also facilitates active control of the solids concentration being delivered to the WAR system.

Water treatment apparatus incorporating wet air regeneration and powdered activated carbon treatment

An apparatus for mixing pressurized air with pressurized waste liquor at the inlet of a wet oxidation system heat exchanger device is disclosed. The apparatus is a T-shaped piping member with an inline first inlet and outlet and a second inlet oriented at about a right angle to said inline first inlet. The outlet is connected to an inlet tube of a tube and shell heat exchanger. A conduit supplies a pressurized waste liquor stream to the piping member through the second inlet. An oxygen-containing gas supply conduit, with circumferential sealing means, extends from exterior the T-shaped member, through the first inlet and terminates at a point beyond the intersection of the first and second inlets. The circumferential sealing means seals to the first inlet. The liquor entering the T-shaped member is heated to a selected elevated temperature prior to contacting a pressurized oxygen-containing gas supplied from the gas supply conduit.

Gas/liquid mixing apparatus

A method for operating a continuous wet oxidation system for destroying cyanide in caustic cyanide and metal wastes which scale upon heating. Raw waste is introduced into the wet oxidation reactor without heating while a mixture of heated dilution water and oxygen containing gas is introduced into the reactor by a separate inlet. The reactor is fitted with a pair of valved effluent lines and corresponding valved lines for introducing dilute mineral acid into each effluent line at system pressure. Oxidized effluent and offgases exit through a first effluent line while dilute mineral acid flows through a second effluent line into the reactor to prevent scale buildup. Periodically the flows are alternated such that oxidized effluent and offgases exit through the second effluent line and dilute mineral acid flows through the first effluent line into the reactor to remove scale. The oxidized effluent and offgases are then cooled and separated.

Growing community of inventors

Walnut, CA, United States of America

Claude E Ellis