Durr Systems Gmbh

Durr Environmental, Inc.

Moco Thermal Industries, Incorporated

Donald I McAnespie

Sunjung Ahn

Jason T Schroeder

Electrostatic precipitators, including wet electrostatic precipitators, having a bank of conductive tubes which receive a gas stream having entrained particulates and an electrode connected to an electric current, wherein the tubes each include an internal restriction creating a hydrostatic pressure more evenly distributing the gas flow between the tubes eliminating the requirement for flow distribution devices, such as air straighteners and perforated plates.

Electrostatic precipitator

A method of cleaning the adsorbent media of a rotary concentrator in-situ while maintaining operation of the concentrator, including directing washing liquid into the sectors in the desorb plenum, then rotating the sectors one full revolution plus at least one sector into the desorb plenum to bring a second sector into the desorb plenum, washing the second sector and repeating the cycle until all of the adsorbent media is washed. The method may also include directing washing liquid into sectors not located in the desorb plenum.

Method of cleaning a rotary concentrator

A method of burning off accumulated contaminants from heat sink media of a regenerative oxidizer having a plurality of segments containing media arranged around a central axis and a rotary valve which includes repeatedly rotating the rotary valve 180 degrees to alternatively direct waste gas through a first plurality of segments, direct the hot gas through a second plurality of segments and purge gas through a third segment to burn off the contaminants, then indexing the rotary valve one segment and repeating the burn-off process of all segments.

Online bakeout of regenerative oxidizers

An improved regenerative thermal oxidizer ('RTO') and improved method of operating same in order to provide a substantially steady-state flow of contaminant-laden air into the RTO. The RTO includes an automatically-operated balancing valve structure for minimizing pressure variations experienced at the inlet of the RTO. The balancing valve is connected to and provides a selectively closeable bypass path for air flow between the high pressure and low pressure sides of an exhaust fan. The balancing valve opens the bypass path whenever flush valves of the RTO are all closed. The RTO further includes a hydraulic control system for minimizing variations in the operation of the RTO due to varying ambient or seasonal temperature conditions to which the RTO may be subjected. The RTO additionally includes a gravity-actuated damper valve structure near the top of a vertically arranged exhaust stack. The damper valve automatically prohibits entry of a stream of cold air into the exhaust stack, while automatically allowing heated processed air to escape the exhaust stack. The RTO is operated according to an improved six-step sequence which provides for the substantially steady-state inlet air flow, due to highly stable air draw rates. The six-step sequence maintains mass air flow rates constant, even though the inlet and outlet valves to the heat exchange chambers of the RTO are opening and closing, and produce periodic air flow reversals within the heat exchange chambers. During the six-step sequence, the steady-state flow is also maintained by opening and closing the balancing valve in a way which counteracts the effects of stopping and starting the flushing gases which are periodically circulated through the heat exchange chambers.

Growing community of inventors

Tecumseh, Canada

Donald I McAnespie