1
Paul L Feldman, Krishnaswamy Sampathkumar: Pulsed electrostatic precipitator. Research Cottrell, Paul & Paul, June 24, 1980: US04209306 (64 worldwide citation)

Parameters for optimum operation of a pulsed multisection electrostatic precipitator are disclosed: It has been discovered that superior particulate collection can be achieved by a combination of pulse and conventional DC voltages. The pulse rise time and decay time are made short enough so that adv ...


2
Philip C Efthimion, Dennis J Helfritch: Apparatus and method for enhanced chemical processing in high pressure and atmospheric plasmas produced by high frequency electromagnetic waves. Research Cottrell, Kerkam Stowell Kondracki & Clarke, November 28, 1989: US04883570 (57 worldwide citation)

An apparatus and method for creating high temperature plasmas for enhanced chemical processing of gaseous fluids, toxic chemicals, and the like, at a wide range of pressures, especially at atmospheric and high pressures includes an electro-magnetic resonator cavity, preferably a reentrant cavity, an ...


3
William Byrd, Stephen J Kohke: Electrostatic precipitator control. Research Cottrell, Paul & Paul, June 28, 1983: US04390831 (50 worldwide citation)

Voltage and current supplied to the primary winding of the transformer-rectifier (T-R) set of an electrostatic precipitator via silicon-controlled rectifiers and a reactor are automatically controlled by sensing spit and spark discharges within the precipitator and the phase shift which occurs betwe ...


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Harold E Van Hoesen, Jakoplic Richard: Rigid discharge electrode for electrical precipitators. Research Cottrell, Kerkam Stowell Kondracki & Clarke, March 1, 1983: US04375364 (42 worldwide citation)

A discharge electrode and discharge electrode assembly having longer more reliable service life than conventional tensioned wires wherein the electrode is categorized as rigid because its mechanical behavior more closely resembles that of a structural beam than a wire of equal length and the electro ...


6
Paul L Feldman: High voltage wetted parallel plate collecting electrode arrangement for an electrostatic precipitator. Research Cottrell, Harold L Stowell, February 19, 1980: US04189308 (38 worldwide citation)

A wetted parallel plate collecting electrode arrangement which increases the maximum electric field intensity possible without having water draining off the lower edges of the collecting electrodes forming small droplets which are accelerated towards the opposite electrodes. An electrically conducti ...


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Paul L Feldman, Robert J Gleason: Method for reduced temperature operation of flue gas collectors. Research Cottrell, Kerkam Stowell Kondracki and Clarke, December 17, 1985: US04559211 (31 worldwide citation)

A method for reduced temperature operation of flue gas collectors is disclosed wherein the benefits of low temperature operation are made possible by avoidance of the acid dewpoint limit. The process increases the specific collecting area of the collector, results in lower pressure drop through the ...


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Dennis H Sapp: Equilateral derrick structure. Research Cottrell, Wegner Stellman McCord Wiles & Wood, October 31, 1978: US04122646 (31 worldwide citation)

An equilateral derrick structure such as for use in erecting chimneys and the like, wherein a plurality of horizontal members, upright diagonal brace members, and vertical column members are interconnected by a plurality of connectors to provide a desired three-dimensional framework derrick. The hor ...


9
Roberts Lawrence M: Electrostatic gas cleaning. Research Cottrell, June 1, 1971: US3581463 (29 worldwide citation)

Suspended matter is removed from combustion gases containing sulfur dioxide by removing a major portion of the particulate matter from a minor portion of the gases, catalytically converting a major portion of the sulfur dioxide content of said minor portion of the gases to sulfur trioxide, mixing sa ...


10
James W Robinson: High energy reverse air dust collector. Research Cottrell, Paul & Paul, October 6, 1981: US04293320 (27 worldwide citation)

Apparatus for removing and collecting dust from dust laden air includes a traveling manifold which travels through an upper clean-air chamber back and forth from one end of the baghouse to the other. Process air is directed upwardly and inwardly through the walls of an array of filter bags suspended ...