Rpc Waste Management Services, Inc.

Chematur Engineering Ab

University of Texas System

Roy N McBrayer, Jr

Jimmy G Swan

John S Barber

James M Eller

James Edward Deaton

Fred Applegath

Walter H Stanton

Robert Ray Gloyna

Jerry Franklin Blagg

Gordon H Lovett, Deceased

Richard D Peacock

Lixiong Li

Earnest F Gloyna

Donald C Matter

Lars Henning Tidlund

Jos A Boere

Donald H Rennie

Mark W Dassel

Richard W Humphries

Fred W Thompson

Contaminated adsorbent particles, preferably activated carbon particles, are regenerated in water at supercritical conditions. The particles are preferably mixed in water prior to treatment. The mixture is preferably heated to a temperature at least about 900.degree. F. (482.degree. C.) and pressurized to a pressure sufficient to achieve supercritical conditions for water. The mixture is preferably flowed through a first reactor for a time sufficient to substantially remove the organic contaminants from the particles. The particles are separated from the water and the mixture of water and organic contaminants may be transferred to a second reactor. Within the second reactor the organic contaminants are preferably substantially oxidized by supercritical water oxidation.

Supercritical treatment of adsorbent materials

Systems and methods for heating, reacting, and/or treating a stream containing oxidizable matter. Recycle reactor is used alone or in conjunction with plug-flow reactor. Density differences in the recycle reactor facilitate flow within the recycle reactor without substantial external heat exchange.

Heating and reaction system and method using recycle reactor

Systems and methods for pressure reduction, including a first conduit with a pressure sensor, a static restriction device, and second conduit connected therebetween. Fluid is introduced through the second conduit as a function of the pressure sensed by the pressure sensor, thereby compensating for fluctuations in sensed pressures due to restriction device degradation and other factors.

Pressure reduction system and method

Oxidation reactions occurring in a plug flow reactor under conditions approximating supercritical water conditions are controlled by injecting a process stream of water and two reactants in non-stoichiometric proportions into the reactor and causing the process stream to flow through the reactor. Water is injected at one or more points downstream from the inlet to lower the temperature of the process stream and additional reactant injected to re-start the reaction. The quench and re-start process is repeated until substantially all oxidizable material in the process stream has be oxidized.

Method for controlling reaction temperature

Method and apparatus for inhibiting plugging in a reactor that operates at a temperature and a pressure that are at least in the vicinity of supercritical condition for water. One or more salts are preferably added, in a controlled manner, to a stream containing a first salt, in order to allow a eutectic, molten blend with the first salt to be formed. The blend may have a melting point below the temperature of the reactor. The stream is introduced into the reactor and preferably at least a portion of the blend is in a molten state. Plugging in the reactor may thus be inhibited or prevented.

Method and apparatus for reacting oxidizable matter with a salt

A method for treating waste water streams by introducing a mixture of pre-heated waste water and an amount of oxidant lower than that required to oxidize all the organic matter in the waste stream into the front port of an elongate tubular reaction chamber. The amount of oxidant is preferably high enough, however, to raise the temperature of the stream in the reaction chamber to 750.degree.-1,200.degree. F. A first injection side port is preferably located downstream from the front port of the reaction chamber at a distance at which the temperature has reached a maximum value, and 90-100% of the available oxidant has been consumed. Oxidant and water may be simultaneously injected through the first port, in a manner that the amount of oxidant is adequate to oxidize a specified amount of organic matter, and the amount of water is effective to counterbalance the heat produced by the reaction of the co-injected oxidant with the respective organic matter. At the point that 90-100% of the newly injected oxidant has been consumed, a second port is used to introduce more oxidant and water in a similar manner and under similar conditions. More ports are also used, following similar rules, until the organic matter has been substantially exhausted. The reaction chamber preferably has a multiplicity of ports, so that depending upon the particular stream, its BTU value, and other parameters, the appropriately spaced ports are selected as injection ports. Highly improved output is achieved by the process and apparatus of the present invention.

Method for treating waste water streams by oxidation in high temperature

Method/system of adding solid particles to inhibit or prevent plugging in a reactor at conditions such that the temperature and pressure are at least in the vicinity of supercritical conditions for water. Particles may be added in conjunction with a pH-adjusting material, thereby inhibiting plugging in the reactor caused by addition of the pH-adjusting material. Reactor pressure may be reduced by flowing the stream through a static restriction device.

Method and apparatus for reacting oxidizable matter with particles

A reactor enclosed in a pressure vessel in a manner that the walls of the pressure vessel are thermally insulated and chemically isolated from the harsh environment of the reaction zone in the reactor. This allows the pressure vessel to handle the high pressures involved, since it is maintained at a reasonably low temperature range. Simultaneously, it allows the reactor to handle the high temperatures involved, since the pressure differentials around it are only minimal.

Reactor for supercritical water oxidation of waste

An apparatus for treating waste water streams is constructed by introducing a mixture of pre-heated waste water and an amount of a oxidant lower than that required to oxidize all the organic matter in the waste stream into the front port of an elongate tubular reaction chamber maintained at supercritical temperatures and pressures. The amount of oxidant is high enough, it initially raise the temperature of the stream in the reaction chamber to 750-1,200.degree. F. A first injection side port is located downstream from the front port of the reaction chamber at a distance at which the temperature has reached a maximum value, and 90-100% of the available oxidant has been consumed. Oxidant and water are simultaneously injected through the first port, in a manner that the amount of oxidant is adequate to oxidize to oxidize a specified amount of organic matter, and the amount of water is effective to counterbalance the heat produced by the ration of the co-injected oxidant with the respective organic matter. At the point that 90-100% of the newly injected oxidant has been consumed, a second port is used to introduce more oxidant and water in a similar manner and under similar conditions. More ports are also used, following similar rules, until the organic matter has been substantially exhausted.

Supercritical oxidation apparatus for treating water with side injection

A high pressure and high temperature reactor, especially operating under supercritical water conditions combined with corrosive atmosphere. The reactor comprises a reaction chamber and a pressure vessel, which surrounds the reaction chamber. It has high integrity since it has only one penetration in the pressure vessel, and its size is minimized due to induced turbulent flow of the ignited reaction mixture.

Turbulent flow cold-wall reactor

An organic or inorganic feed compound can be treated in two or more zones to progressively oxidize the compound. The first zone oxidizes the compound to an intermediate product which includes a first intermediate compound which is intermediate the feed compound and end product. The second zone further oxidizes the intermediate product to an end product or a second intermediate compound which is intermediate the first intermediate compound and an end product. One or both zones may operate catalytically and/or at supercritical conditions for water to oxidize the compounds.

Growing community of inventors

Austin, TX, United States of America

Roy N McBrayer, Jr