James J. Schwab - Seattle WA Owen J. Tassicker - Cupertino CA
Assignee:
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
B03C 300
US Classification:
361230
Abstract:
An improved electrode assembly for a high-intensity ionizer array utilized as the first stage in a two-stage electrostatic precipitator. Each ionizer unit employs a pair of co-axial electrodes to create a high-intensity electric field across the path of a particulate-laden gas stream. As the gas passes through the field, it is intensely ionized and the particulate becomes highly charged. The ionizer anode comprises a venturi diffuser through which the gas stream flows immediately prior to entry into a precipitator stage which removes the charged particles. The ionizer cathode is a disk co-axially mounted within the venturi throat and having an arcuate periphery. A high voltage power supply connected between the anode and cathode establishes a high-intensity corona discharge in the annular region formed between the edge of the cathode disk and the surrounding cylindrical anode surface. Focusing electrodes at cathode potential are positioned on either side of the cathode disk and intensify the electric field along the anode wall at the fringes of the current flux band upstream and downstream from the corona discharge plane. This substantially reduces the width of the anode surface subjected to corona current and minimizes anode cleaning requirements by reducing the particle deposition area.
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
B01D 4602 B01D 2962
US Classification:
55302
Abstract:
An apparatus especially suitable for filtering out a particulate material from a carrier fluid such as flue gases is disclosed herein. This assembly utilizes a main vessel defining an interior compartment and having an inlet and separate outlet. A number of filter assemblies are disposed within the vessel compartment and supported therein in spaced relationship with one another and with the vessel itself by means of a single tubular member which also serves as a discharge pipe between the filter assemblies and the vessel's outlet.
Method And Means For Measuring Particulate Matter On A Filter
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
B01D 4600 G01D 2100
US Classification:
73 28
Abstract:
The amount of particulate matter deposited on a fabric filter during operating conditions is determined by capacitive measurements. The fabric filter material is mounted on a first perforated electrode and a second electrode is spaced from the first electrode and capacitively associated therewith. Capacitance between the electrodes varies with the amount of particulate matter on the filter. Bridge circuitry is employed to determine the capacitance between the electrodes.
An apparatus especially suitable for filtering out a particulate material from a carrier fluid such as flue gases, as disclosed herein. This assembly utilizes a main vessel defining an interior compartment having an inlet and separate outlet. A number of filter assemblies are disposed within the vessel compartment and supported therein in spaced relationship with one another and with the vessel itself by means of a tubular member which also serves as a discharge pipe between the filter assemblies and the vessel's outlet. The main vessel is designed to act as an elementary cyclone so that filtering is carried out by both the filter assemblies and cyclonic action. Also, such filters are periodically cleaned by an arrangement that provided preheated reverse pressure pulses.
Electric Power Research Institute, Inc. - Palo Alto CA
International Classification:
B01D 4602 B01D 2938
US Classification:
55302
Abstract:
An apparatus especially suitable for filtering out a particulate material from a carrier fluid such as flue gases is disclosed herein. This assembly utilizes a main vessel defining an interior compartment and having an inlet and separate outlet. A number of filter assemblies are disposed within the vessel compartment and supported therein in spaced relationship with one another and with the vessel itself by means of a single tubular member which also serves as a discharge pipe between the filter assemblies and the vessel's outlet.