US3754379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electrode rapper control
Assignee: Beazer East Inc
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Filing: 1971-02-11
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Granted: 1973-08-28
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Expires: 1991-02-11
Abstract
Abstract A rapper control senses the particle load collected on selected electrostatic precipitator electrodes and automatically energizes corresponding rappers connected to the selected electrodes when the collected particle load magnitude on the electrodes exceeds a predetermined limit and de-energizes the rappers when the collected particle load magnitude obtains a predetermined minimum to optimize the amount of precipitant on the collecting electrodes. The control is preferably electronic and is normally used in conjunction with a plurality of sets of rappers which are independently and sequentially energized. The load distribution of the particles collected on the precipitator electrodes is monitored and the rapper sets are selectively energized in a sequence governed by the pattern of the particle load distribution.
Inventors
- 👤 R Bridges
- 👤 P Harper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:05
CPC Classifications
B; B03; B03C; B03C3/00; B03C3/34; B03C3/66
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
384 words
An electrostatic precipitator having electrodes, rapping means therefor, and an electronic logic control for regulating the frequency and duration of rapper energization comprising: a clock pulse generator circuit for producing a series of clock pulses at a selected frequency having first and second logic levels; a ripple counting circuit operative in response to first and second logic levels of said clock pulses to produce monitoring sequence pulses having first and second logic levels; a load sensing circuit operable to sense the particle load magnitudes collected on different selected ones of said electrodes and produce in response to said sensing load pulses having first and second logic levels indicative of a desired rapping on-time and off-time respectively as defined within a maximum and minimum desired particle load magnitude for each of said different selected ones of electrodes; a decoding monitor circuit operable in response to said first and second logic levels of said monitoring sequence pulses and to said load pulses for sequentially monitoring said load pulses and selectively producing rapper driving pulses having first and second logic levels, said rapper driving pulses being produced in separate output channels corresponding in number to and respectively associated with each of said different selected ones of electrodes and being sequentially selected by said first and second logic levels of said monitoring sequence pulses when the on-time is indicated by said first and second logic levels of the respective one of said load pulses then being monitored; a rapping means driving circuit having associated channels for connecting said rapper driving pulses to respective ones of said rapping means respectively associated with said different selected ones of said electrodes for energization; means responsive to said first and second logic levels of said rapper driving pulses to interrupt the feed of said series of clock pulses to said ripple counting circuit during said rapping on-time and activate the feed of said series of clock pulses to said ripple counting circuit during said rapping offtime; and an on-timer circuit operable in response to said first and second logic levels of said rapper driving pulses for timing a maximum allowable duration of energization of any of said rapping means and reactivating the feed of said series of clock pulses to said ripple counting circuit in the event said maximum time is attained.
Claim 2
Dependent Claim
384 words
An electrostatic precipitator having electrodes, rapping means therefor, and an electronic logic control for regulating the frequency and duration of rapper energization comprising: a clock pulse generator circuit for producing a series of clock pulses at a selected frequency having first and second logic levels; a ripple counting circuit operative in response to first and second logic levels of said clock pulses to produce monitoring sequence pulses having first and second logic levels; a load sensing circuit operable to sense the particle load magnitudes collected on different selected ones of said electrodes and produce in response to said sensing load pulses having first and second logic levels indicative of a desired rapping on-time and off-time respectively as defined within a maximum and minimum desired particle load magnitude for each of said different selected ones of electrodes; a decoding monitor circuit operable in response to said first and second logic levels of said monitoring sequence pulses and to said load pulses for sequentially monitoring said load pulses and selectively producing rapper driving pulses having first and second logic levels, said rapper driving pulses being produced in separate output channels corresponding in number to and respectively associated with each of said different selected ones of electrodes and being sequentially selected by said first and second logic levels of said monitoring sequence pulses when the on-time is indicated by said first and second logic levels of the respective one of said load pulses then being monitored; a rapping means driving circuit having associated channels for connecting said rapper driving pulses to respective ones of said rapping means respectively associated with said different selected ones of said electrodes for energization; means responsive to said first and second logic levels of said rapper driving pulses to interrupt the feed of said series of clock pulses to said ripple counting circuit during said rapping on-time and activate the feed of said series of clock pulses to said ripple counting circuit during said rapping offtime; and an on-timer circuit operable in response to said first and second logic levels of said rapper driving pulses for timing a maximum allowable duration of energization of any of said rapping means and reactivating the feed of said series of clock pulses to said ripple counting circuit in the event said maximum time is attained.
Claim 3
Dependent Claim
15 words
The control of claim 1 including means for regulating the intensity of said rapper energization.
Claim 4
Dependent Claim
41 words
The control of claim 1 wherein said load sensing circuit includes a plurality of load cell actuated switches connected respectively to a corresponding number of bi-stable flip-flops, said switches operable to set and reset said flip-flops for producing said load pulses.
Claim 5
Dependent Claim
35 words
The control of claim 3 wherein said load cell actuated switches include means for setting a maximum and minimum load actuation switching limit therefor corresponding to said desired maximum and minimum particle load magnitudes respectively.
Claim 6
Dependent Claim
50 words
The control of claim 1 including an annunciator circuit responsive to load cells in said load sensing circuit for producing alarm signals when said particle load magnitude is above said maximum magnitude by a preselected amount and said particle load magnitude is below said minimum magnitude by a selected amount.
Claim 7
Dependent Claim
74 words
The control of claim 1 further including: a solid state switch for completing a current path upon being made conductive for a current supply to each of said rappers for energization thereof; each of said switches connected to corresponding ones of said chaNnels and made conductive during the duration of said monitored load pulses present on the respective channels; whereby said rappers are energized in a sequence and for a time regulated by need.
Claim 8
Dependent Claim
150 words
An electrostatic precipitator for removing particles from a gas comprising: discharge electrodes for applying an electrostatic charge to said particles, collecting electrodes for collecting said charged particles, a plurality of rappers operable upon energization for vibrating preselected portions of said collecting electrodes to remove particles collected thereon, means for sequentially monitoring the amount of precipitant load collected on said preselected collecting electrode portions, means for interrupting said means for monitoring and energizing said rappers having corresponding collecting electrode precipitant loads exceeding a predetermined limit upon being monitored, means for de-energizing said energized rappers and reactivating said means for monitoring when said precipitant load attains a predetermined minimum, and on-timer means for reactivating said means for monitoring upon the failure of said means for de-energizing the rappers and reactivating the means for monitoring to function after a maximum predetermined period of energization time required for attaining said minimum predetermined precipitant load.
Claim 9
Dependent Claim
150 words
An electrostatic precipitator for removing particles from a gas comprising: discharge electrodes for applying an electrostatic charge to said particles, collecting electrodes for collecting said charged particles, a plurality of rappers operable upon energization for vibrating preselected portions of said collecting electrodes to remove particles collected thereon, means for sequentially monitoring the amount of precipitant load collected on said preselected collecting electrode portions, means for interrupting said means for monitoring and energizing said rappers having corresponding collecting electrode precipitant loads exceeding a predetermined limit upon being monitored, means for de-energizing said energized rappers and reactivating said means for monitoring when said precipitant load attains a predetermined minimum, and on-timer means for reactivating said means for monitoring upon the failure of said means for de-energizing the rappers and reactivating the means for monitoring to function after a maximum predetermined period of energization time required for attaining said minimum predetermined precipitant load.
Claim 10
Dependent Claim
64 words
The electrostatic precipitator of claim 7 including means for rigidly supporting said collecting electrodes, said means for sequentially monitoring the amount of said collected precipitant load including pressure sensitive load cell devices operatively positioned in said rigid supporting means to sense in the tension or compression mode the weight of respective of said preselected collecting electrode portions plus the corresponding precipitant load collected thereon.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |