Thermo Power Corporation

Tecogen, Inc.

Ronald W Breault

Frederick E Becker

Christopher R McLarnon

Andrew W McClaine

Anthony F Litka

Virendra K Mathur

Frank G Medros

Kailash C Shukla

Fred E Becker

Steven Bittenson

A high efficiency, Vortex Inertial Staged Air (VIStA) combustor provides ultra-low NO.sub.X production of about 20 ppmvd or less with CO emissions of less than 50 ppmvd, both at 3% O.sub.2. Prompt NO.sub.X production is reduced by partially reforming the fuel in a first combustion stage to CO and H.sub.2. This is achieved in the first stage by operating with a fuel rich mixture, and by recirculating partially oxidized combustion products, with control over stoichiometry, recirculation rate and residence time. Thermal NO.sub.X production is reduced in the first stage by reducing the occurrence of high temperature combustion gas regions. This is achieved by providing the first stage burner with a thoroughly pre-mixed fuel/oxidant composition, and by recirculating part of the combustion products to further mix the gases and provide a more uniform temperature in the first stage. In a second stage combustor thermal NO.sub.X production is controlled by inducing a large flow of flue gas recirculation in the second stage combustion zone to minimize the ultimate temperature of the flame. One or both of the first and second stage burners can be cooled to further reduce the combustion temperature and to improve the recirculation efficiency. Both of these factors tend to reduce production of NO.sub.X.

Low NO.sub.x multistage combustor

This invention concerns a method and apparatus for delivery of exogenous non-thermal plasma activated species to a subject fluid comprising

Preparation of independently generated highly reactive chemical species

A raining bed heat exchanger includes: a hollow stack; a feed inlet located near the top of the stack for introducing particulate material into the stack so that the material falls through the stack; a gas inlet located near the bottom of the stack for introducing rising gases into the stack so that the gases flow counter to the falling material; a plurality of baffles supported within the stack between the feed and gas inlets for retarding the falling material and prolonging its exposure to the gases; and a disengagement section located near the top of the stack for separating from the gases particulates entrained by the rising gases. The disengagement section includes a screen positioned within the stack and having a plurality of gaps through which the rising gases pass in order to sufficiently separate the entrained particulates. Alternatively, the disengagement section can include a filter media to separate the entrained particulates. Also, at least one of the baffles can include a hollow tube and refractory insulation surrounding the hollow tube. The heat exchanger can be connected to a cyclone to form a heat exchanger system that includes a flow generating mechanism adapted to continuously reintroduce particulates separated by the cyclone back into the heat exchanger.

Raining bed heat exchanger and method of use

This invention is drawn to a Volatile Organic Compound environment effective reduction apparatus comprising a reactor-efficient coronal discharge zone, and at least one pair of high-dielectric coated electrodes. In particular embodiments Halogenated volatile organic compounds are reduced and the reaction chamber is chlorine and fluorine resistant.

Volatile organic compound and chlorinated volatile organic compound

This invention presents an NO.sub.x environment effective reduction apparatus comprising a sulfur tolerant, high water vapor (about 3% to about 18%) tolerant, packing-free coronal-catalyst. In one embodiment the invention comprises an NO.sub.x reduction apparatus of high water vapor tolerant coronal-catalyst adapted and configured for hypercritical presentation of an electrical field to an NO.sub.x bearing gas stream, where the electrical field has a minimum field power density of at least about 75 watts/cubic meter, and optionally, accompanying downstream scrubbers. In a particular embodiment, downstream wet or dry absorption arrest particular NO.sub.x reduction products NO.sub.2 and HNO.sub.3, optionally upon exposure to an arresting agent, including basic, caustic, or alkali materials such as CaO or NH.sub.3.

Coronal-catalytic apparatus and method for NO.sub.x reduction

This invention presents an NO.sub.x environment effective reduction apparatus comprising a sulfur tolerant coronal-catalyst such as high dielectric coronal-catalysts like glass wool, ceramic-glass wool or zirconium glass wool and method of use. In one embodiment the invention comprises an NO.sub.x reduction apparatus of sulfur tolerant coronal-catalyst adapted and configured for hypercritical presentation to an NO.sub.x bearing gas stream at a minimum of at least about 75 watts/cubic meter.

Growing community of inventors

Kingston, NH, United States of America

Ronald W Breault