Durr Environmental, Inc.

Ajay Gupta

Joseph M Klobucar

Dinesh Bhushan

An apparatus for treating gaseous pollutants in an air stream such as a regenerative thermal oxidizer or a selective catalytic reduction system, including a reaction chamber wherein the reaction media bed within the chamber comprises a plurality of nonprismatic ceramic blocks each having end faces, side faces and a chamfered face extending at an angle relative to the side faces of the blocks. The ceramic blocks are stacked in end-to-end and side-to-side relation within the reaction chamber and the ceramic blocks each include spaced parallel passages extending through the end and chamfered faces. The chamfered faces of adjacent blocks form voids between the blocks promoting turbulent gas flow through the voids and equalizing the pressure within the reaction chamber. The ceramic blocks may be symmetrical, wherein only a portion of the gas flows into the voids between the blocks and the remainder flows through the channels through the end faces or the ceramic blocks may be nonsymmetrical, wherein the chamfered faces are located vertically opposite an end face, such that all of the gas flowing through the reaction chamber flows through the gas passages into the voids between the blocks at alternative levels.

Pollution abatement reactor system having nonprismatic structured media

The invention places a concentration averaging device in an inlet line leading to an air treatment system. The device includes an adsorbent material which has the quality of increasing its equilibrium concentration of impurities with increasing percentage or concentration of impurities in the air stream. In this way, the concentration device tends to 'average' the amount of impurities in the air stream delivered to the air treatment system. When used on an oxidizer, as an example, this allows the use of smaller combustion chambers, and reduces the fuel requirements for operation of the system.

Concentration averaging device for impurities in industrial air stream

A two stage rotary concentrator takes the gas from the first stage desorption section and passes it back into a second stage concentrator process. A second stage desorption gas is passed over the rotary concentrator in a second stage desorption section. The gas from the second stage desorption section may then be passed for final treatment. The invention greatly reduces the volume of air which must be sent for final treatment.

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Ann Arbor, MI, United States of America

Ajay Gupta