US3719031A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric field directed control of dust in electrostatic precipitators
Assignee: Envirotech Corp
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Filing: 1971-06-08
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Granted: 1973-03-06
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Expires: 1991-06-08
Abstract
Abstract In an electrostatic precipitator, a downwardly directed corona discharge is produced at the entrance to dust collecting hoppers attached at the bottom of the precipitator chamber, the corona discharge being produced by an array of corona discharge points connected to a high voltage source and a grounded electrode grid positioned below the corona points near the hopper entrance either in the hopper or in the chamber.
Inventors
- 👤 P Gelfand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:43
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/88
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
138 words
In an electrostatic precipitator having a housing that defines a flow chamber therein, an inlet opening for conveying a flowing stream of gas carrying dust particles into the chamber, an outlet opening located adjacent a bottom portion of the flow chamber, a dust collector hopper for receiving through a bottom opening in a chamber dust particles removed from the gas, and a plurality of emitting and collecting electrodes extending substantially vertically through the chamber across the path of gas flow, the improvement comprising means for generating a corona discharge disposed below the emitting and collecting electrodes and above the hopper, and a grounded electrode configuration disposed below the corona discharge means, the corona discharge means and electrode configuration providing a corona emission and an electric wind from said means toward the electrode configuration when said means is energized.
Claim 2
Dependent Claim
138 words
In an electrostatic precipitator having a housing that defines a flow chamber therein, an inlet opening for conveying a flowing stream of gas carrying dust particles into the chamber, an outlet opening located adjacent a bottom portion of the flow chamber, a dust collector hopper for receiving through a bottom opening in a chamber dust particles removed from the gas, and a plurality of emitting and collecting electrodes extending substantially vertically through the chamber across the path of gas flow, the improvement comprising means for generating a corona discharge disposed below the emitting and collecting electrodes and above the hopper, and a grounded electrode configuration disposed below the corona discharge means, the corona discharge means and electrode configuration providing a corona emission and an electric wind from said means toward the electrode configuration when said means is energized.
Claim 3
Dependent Claim
138 words
In an electrostatic precipitator having a housing that defines a flow chamber therein, an inlet opening for conveying a flowing stream of gas carrying dust particles into the chamber, an outlet opening located adjacent a bottom portion of the flow chamber, a dust collector hopper for receiving through a bottom opening in a chamber dust particles removed from the gas, and a plurality of emitting and collecting electrodes extending substantially vertically through the chamber across the path of gas flow, the improvement comprising means for generating a corona discharge disposed below the emitting and collecting electrodes and above the hopper, and a grounded electrode configuration disposed below the corona discharge means, the corona discharge means and electrode configuration providing a corona emission and an electric wind from said means toward the electrode configuration when said means is energized.
Claim 4
Dependent Claim
138 words
In an electrostatic precipitator having a housing that defines a flow chamber therein, an inlet opening for conveying a flowing stream of gas carrying dust particles into the chamber, an outlet opening located adjacent a bottom portion of the flow chamber, a dust collector hopper for receiving through a bottom opening in a chamber dust particles removed from the gas, and a plurality of emitting and collecting electrodes extending substantially vertically through the chamber across the path of gas flow, the improvement comprising means for generating a corona discharge disposed below the emitting and collecting electrodes and above the hopper, and a grounded electrode configuration disposed below the corona discharge means, the corona discharge means and electrode configuration providing a corona emission and an electric wind from said means toward the electrode configuration when said means is energized.
Claim 5
Dependent Claim
19 words
The improvement set forth in claim 1 wherein the corona discharge means comprises an array of corona discharge points.
Claim 6
Dependent Claim
22 words
The improvement set forth in claim 2, wherein each corona discharge point is electrically connected to an emitting electrode of the precipitator.
Claim 7
Dependent Claim
63 words
The improvement set forth in claim 3, wherein the emitting electrodes comprise wires suspended from the top portion of the chamber, a weight is attached at the bottom of each emitting electrode, and each of the corona discharge points is a length of wire connected to the bottom of each weight and projecting downwardly therefrom, each wire being pointed at its lowermost end.
Claim 8
Dependent Claim
41 words
The improvement set forth in claim 4, wherein the length of wire forming each corona discharge point is about 4 inches long, with a radius of about 0.109 inch, and the point is beveled at about 30* from the wire axis.
Claim 9
Dependent Claim
42 words
The improvement set forth in claim 1, wherein the electrode configuration is a screen formed of two sets of conductive wires, the wires in each set running generally parallel to each other and generally perpendicular to the wires in the other set.
References Cited (Backward Citations)
US1888606A
Cited
US2506996A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-05 | 1976-09-04 | 1977-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-05 | 1980-09-04 | 1981-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-05 | 1984-09-04 | 1985-03-06 | $7700.00 | Window Closed / Lapsed |