Indigo Technologies Group Pty Ltd

Other

Fmc Corporation

Peroxychem LLC

Rodney John Truce

Henry A Pfeffer

Richard Malcolm Kelso

Timothy Holtz

JoAnn Pacinelli

Luke F Wilkinson

John Walter Wilkins

Graham Jerrold Nathan

Peter Anthony Markus Kalt

Mieczyslaw Adam Gostomczyk

Joann Pacinelli

Timothy A Holtz

Concentrated aqueous hydrogen peroxide or another reactive compound in a liquid carrier is activated by atomization and contact with a suitable catalyst that is concurrently atomized in a carrier liquid. Concentrated hydrogen peroxide and a hydrogen peroxide activation catalyst are atomized into a droplet spray for catalytic activation of the hydrogen peroxide in this invention, useful for treatment of a combustion flue gas containing contaminants such as NOand/or Hg.

Activation of reactive compound with catalyst

Interaction between two different species of particles in a fluid stream is promoted by generating turbulent eddies in the fluid stream. The turbulent eddies are designed to be of such size and/or intensity that the two species of particles are entrained into the eddies to significantly different extents. Consequently, the different species of particles follow different trajectories, and the likelihood of collisions or interactions between the particles is increased. Optimum collision rates will occur for a system which maintains a Stokes Number (St) much less than 1 for one species, and or order 1 or greater for the other species. The invention has particular application in air pollution control, by promoting agglomeration of fine pollutant particles in air streams into larger particles to thereby facilitate their subsequent removal from the air streams.

Particle interactions in a fluid flow

A reactor cools humidifies gases produced by combustion or the like. The reactor has a chamber with an inlet at a lower end to receive a flow of gas, and an outlet at a upper end. The gas flows in a generally upward direction through the reactor. The horizontal cross-section of the chamber increases with height and the flow velocity of the gas decreases as it flows upwardly. The reactor includes at least one device for injecting water droplets into the upper region of the chamber, counter to the gas flow. As the water droplets fall, they gradually evaporate and lose mass and encounter a counterflow of increasingly higher velocity and temperature until the force of the upwardly flowing gas is sufficient to reverse their flow and carry them in an upward direction.

Reverse flow reactor

An electrostatic filter () has a chamber () into which a gas stream is introduced. An ioniser () in the form of an electrode array () is located in the chamber () and creates an ionising zone through which the gas stream passes. A charged outlet () is located downstream from the ioniser (). As the gas stream passes through the ionising zone, the unwanted particles therein are charged and urged away from the outlet () by the ioniser (). Charged particles approaching the outlet () are also electrostatically repelled therefrom, permitting 'clean' gas to be extracted through the outlet.

Electrostatic filter

Fine particles of dust and other pollutants in gas streams are agglomerated to form larger particles which are more easily filtered in downstream processing. In one embodiment, particles in successive portions of the gas stream are charged with opposite polarity, and the gas stream is introduced into an Evas&#xe9; portion () to slow it down. Particles of different sizes have differential deceleration and therefore mix generally in the direction of flow, leading to agglomeration of oppositely-charged particles. In another embodiment, a gas stream is divided into substreams in respective parallel passages, and the particles in adjacent passages are charged to opposite polarity. Deflectors at the downstream end of the passages cause substreams of particles of opposite polarity to mix, with resultant agglomeration of oppositely charged particles.

Method and apparatus for particle agglomeration

The invention relates to the detection of the presence of back corona in an electrostatic precipitator, the measurement of parameters associated with back corona and the control of the electrostatic precipitator system and associated plant. The parameters detected provide indication of the sensitivity of the precipitator and dust to back corona formation, the severity of back corona occuring within the precipitator, the efficiency of the dust collection process and the level of dust build-up on the electrodes within the precipitator. These parameters may be displayed to the operator and used in controlling precipitator systems and associated plant.

Growing community of inventors

Sherwood, Australia

Rodney John Truce