US3695004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas cleaning system
Assignee: Arco Industries Corp
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Filing: 1970-10-27
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Granted: 1972-10-03
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Expires: 1990-10-27
Abstract
Abstract A gas cleaning system for cleaning gases from an incinerator or the like wherein the gas is discharged at a variable rate including a gas cleaning device such as a wet scrubber that requires gas to be fed into the scrubber at a minimum velocity for efficient operation. A delivery duct feeds the gases from the incinerator to the cleaning device and a discharge duct conducts the gas from the cleaning device. A blower forces or induces the gas through the discharge duct. In order to maintain an efficient rate of flow of gas into the cleaning device, a recirculating duct has one end connected with the discharge duct on the downstream side of the blower and its other end connected with the delivery duct, and flow is proportioned between the recirculating duct and the delivery duct in accordance with variations in the velocity of the gas in the delivery duct so that the gas entering the cleaning device is maintained at an efficient rate of flow. The system further includes a temperature responsive modulating valve for controlling the flow of scrubbing liquid into the cleaning device in accordance with variations in the temperature of the gas exiting from the cleaning device so that the supply of water to the cleaning device can be reduced when the temperature drops and can be increased as necessary when the temperature of the gas increases, and thereby maintain constant temperature and gas weight to the blower to prevent overload of the driving device.
Inventors
- 👤 Michael P Delisio
- 👤 Robert L Clement
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:34
CPC Classifications
B; B01; B01D; B01D47/00; B01D47/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
134 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed through said cleaning device; a delivery duct connected with said cleaning device for conducting gas to said cleaning device; a discharge duct connected with said cleaning device for conducting gas from said cleaning device; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; and flow control means interconnected with said delivery duct, discharge duct and recirculating duct for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct.
Claim 2
Independent Claim
134 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed through said cleaning device; a delivery duct connected with said cleaning device for conducting gas to said cleaning device; a discharge duct connected with said cleaning device for conducting gas from said cleaning device; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; and flow control means interconnected with said delivery duct, discharge duct and recirculating duct for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct.
Claim 3
Dependent Claim
57 words
A system as claimed in claim 1 wherein said flow control means includes a damper movable in one direction to increase the flow through said recirculating duct and decrease the flow through said discharge duct, and movable in the opposite direction to decrease the flow through said recirculating duct and increase the flow through said discharge duct.
Claim 4
Dependent Claim
65 words
A system as claimed in claim 2 wherein said flow control means includes a motor connected with said damper and operable to move said damper in said one direction in response to decreases in the velocity of gas in said delivery duct, and operable to move said damper in said opposite direction in response to increases in the velocity of gas in said delivery duct.
Claim 5
Dependent Claim
72 words
A system as claimed in claim 3 wherein said flow control means includes a pressure responsive control for said motor connected with said delivery duct and operable to actuate said motor to move said damper in said one direction when the velocity of gas in said delivery duct decreases and to actuate said motor to move said damper in said opposite direction when the velocity of gas in said delivery duct increases.
Claim 6
Dependent Claim
58 words
A system as claimed in claim 4 further including a conduit connected with said cleaning device for conducting liquid into said cleaning device for contact with gas therein; and regulating means controlling said conduit and operable to vary the flow of liquid into said cleaning device in accoRdance with variations in a condition external to said cleaning device.
Claim 7
Dependent Claim
37 words
A system as claimed in claim 5 wherein said regulating means comprises a modulating valve operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in said discharge duct.
Claim 8
Dependent Claim
58 words
A system as claimed in claim 1 further including a conduit connected with said cleaning device for conducting liquid into said cleaning device for contact with gas therein; and regulating means controlling said conduit and operable to vary the flow of liquid into said cleaning device in accordance with variations in a condition external to said cleaning device.
Claim 9
Dependent Claim
37 words
A system as claimed in claim 7 wherein said regulating means comprises a modulating valve operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in said discharge duct.
Claim 10
Dependent Claim
70 words
A system as claimed in claim 8 wherein said regulating means includes a temperature controller for said valve connected with said discharge duct and operable to actuate said valve to increase the supply of liquid to said cleaning device when the temperature of gas in said discharge duct rises and to decrease the supply of liquid to said cleaning device when the temperature of gas in said discharge duct decreases.
Claim 11
Independent Claim
429 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed through said cleaning device; a delivery duct connected with said cleaning device for conducting gas to said cleaning device; a discharge duct connected with said cleaning device for conducting gas from said cleaning device; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; flow control means for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct, said flow control means including a damper movable in one direction to increase the flow through said recirculating duct and decrease the flow through said discharge duct, and movable in the opposite direction to decrease the flow through said recirculating duct and increase the flow through said discharge duct, a motor connected with said damper and operable to move said damper in said one direction in response to decreases in the velocity of gas in said delivery duct, and operable to move said damper in said opposite direction in response to increases in the velocity of gas in said delivery duct, and a pressure responsive control for said motor connected with said delivery duct and operable to actuate said motor to move said damper in said one direction when the velocity of gas in said delivery duct decreases and to actuate said motor to move said damper in said opposite direction when the velocity of gas in said delivery duct increases; a conduit connected with said cleaning device for conducting liquid into said cleaning device for contact with gas therein; and regulating means controlling said conduit and operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in a condition external to said cleaning device, said regulating means comprising a modulating valve operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in said discharge duct and including a temperature controller for said valve connected with said discharge duct and operable to actuate said valve to increase the supply of liquid to said cleaning device when the temperature of gas in said discharge duct rises and to actuate said valve to decrease the supply of liquid to said cleaning device when the temperature of gas in said discharge duct decreases.
Claim 12
Independent Claim
429 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed through said cleaning device; a delivery duct connected with said cleaning device for conducting gas to said cleaning device; a discharge duct connected with said cleaning device for conducting gas from said cleaning device; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; flow control means for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct, said flow control means including a damper movable in one direction to increase the flow through said recirculating duct and decrease the flow through said discharge duct, and movable in the opposite direction to decrease the flow through said recirculating duct and increase the flow through said discharge duct, a motor connected with said damper and operable to move said damper in said one direction in response to decreases in the velocity of gas in said delivery duct, and operable to move said damper in said opposite direction in response to increases in the velocity of gas in said delivery duct, and a pressure responsive control for said motor connected with said delivery duct and operable to actuate said motor to move said damper in said one direction when the velocity of gas in said delivery duct decreases and to actuate said motor to move said damper in said opposite direction when the velocity of gas in said delivery duct increases; a conduit connected with said cleaning device for conducting liquid into said cleaning device for contact with gas therein; and regulating means controlling said conduit and operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in a condition external to said cleaning device, said regulating means comprising a modulating valve operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in said discharge duct and including a temperature controller for said valve connected with said discharge duct and operable to actuate said valve to increase the supply of liquid to said cleaning device when the temperature of gas in said discharge duct rises and to actuate said valve to decrease the supply of liquid to said cleaning device when the temperature of gas in said discharge duct decreases.
Claim 13
Independent Claim
313 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed through said cleaning device; a delivery duct connected with said cleaning device for conducting gas to said cleaning device; a discharge duct connected with said cleaning device for conducting gas from said cleaning device; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; flow control means for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct; a conduit connected with said cleaning device for conducting liquid into said cleaning device for contact with gas therein; regulating means controlling said conduit and operable to vary the flow of liquid into said cleaning device in accordance with variations in a condition external to said cleaning device, said regulating means comprising a modulating valve operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in said discharge duct; said regulating means further including a temperature controller for said valve connected with said discharge duct and operable to actuate said valve to increase the supply of liquid to said cleaning device when the temperature of gas in said discharge duct rises and to decrease the supply of liquid to said cleaning device when the temperature of gas in said discharge duct decreases; and said flow control means including a damper movable in one direction to increase the flow through said recirculating duct and decrease the flow through said discharge duct, and movable in the opposite direction to decrease the flow through said recirculating duct and increase the flow through said discharge duct.
Claim 14
Independent Claim
313 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed through said cleaning device; a delivery duct connected with said cleaning device for conducting gas to said cleaning device; a discharge duct connected with said cleaning device for conducting gas from said cleaning device; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; flow control means for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct; a conduit connected with said cleaning device for conducting liquid into said cleaning device for contact with gas therein; regulating means controlling said conduit and operable to vary the flow of liquid into said cleaning device in accordance with variations in a condition external to said cleaning device, said regulating means comprising a modulating valve operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature in said discharge duct; said regulating means further including a temperature controller for said valve connected with said discharge duct and operable to actuate said valve to increase the supply of liquid to said cleaning device when the temperature of gas in said discharge duct rises and to decrease the supply of liquid to said cleaning device when the temperature of gas in said discharge duct decreases; and said flow control means including a damper movable in one direction to increase the flow through said recirculating duct and decrease the flow through said discharge duct, and movable in the opposite direction to decrease the flow through said recirculating duct and increase the flow through said discharge duct.
Claim 15
Dependent Claim
65 words
A system as claimed in claim 11 wherein said flow control means includes a motor connected with said damper and operable to move said damper in said one direction in response to decreases in the velocity of gas in said delivery duct, and operable to move said damper in said opposite direction in response to increases in the velocity of gas in said delivery duct.
Claim 16
Dependent Claim
72 words
A system as claimed in claim 12 wherein said flow control means includes a pressure responsive control for said motor connected with said delivery duct and operable to actuate said motor to move said damper in said one direction when the velocity of gas in said delivery duct decreases and to actuate said motor to move said damper in said opposite direction when the velocity of gas in said delivery duct increases.
Claim 17
Independent Claim
212 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed therethrough, said gas cleaning device having an inlet for receiving gas and an outlet for discharging gas; a conduit for supplying liquid to said gas cleaning device for contact with gas in said cleaning device; and temperature responsive flow regulating means controlling said conduit operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature of gas discharged from said outlet, said flow regulating means comprising a modulating valve operable to vary the flow into said cleaning device in accordance with variations in the temperature of gas discharged through said outlet; a delivery duct connected with said inlet; a discharge duct connected with said outlet; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; and flow control means interconnected with said delivery duct, discharge duct, and recirculating duct for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct.
Claim 18
Independent Claim
212 words
A system for cleaning gas discharged from an incinerator or the like comprising: a gas cleaning device operable to remove impurities from gas fed therethrough, said gas cleaning device having an inlet for receiving gas and an outlet for discharging gas; a conduit for supplying liquid to said gas cleaning device for contact with gas in said cleaning device; and temperature responsive flow regulating means controlling said conduit operable to vary the flow of liquid into said cleaning device in accordance with variations in the temperature of gas discharged from said outlet, said flow regulating means comprising a modulating valve operable to vary the flow into said cleaning device in accordance with variations in the temperature of gas discharged through said outlet; a delivery duct connected with said inlet; a discharge duct connected with said outlet; a blower for causing gas to move through said discharge duct; a recirculating duct having one end connected with said discharge duct on the downstream side of said blower and its other end connected with said delivery duct; and flow control means interconnected with said delivery duct, discharge duct, and recirculating duct for proportioning flow between said recirculating duct and said discharge duct in accordance with variations in the velocity of gas in said delivery duct.
Claim 19
Dependent Claim
57 words
A sYstem as claimed in claim 14 wherein said flow control means includes a damper movable in one direction to increase the flow through said recirculating duct and decrease the flow through said discharge duct, and movable in the opposite direction to decrease the flow through said recirculating duct and increase the flow through said discharge duct.
Claim 20
Dependent Claim
65 words
A system as claimed in claim 15 wherein said flow control means includes a motor connected with said damper and operable to move said damper in said one direction in response to decreases in the velocity of gas in said delivery duct, and operable to move said damper in said opposite direction in response to increases in the velocity of gas in said delivery duct.
Claim 21
Dependent Claim
72 words
A system as claimed in claim 16 wherein said flow control means includes a pressure responsive control for said motor connected with said delivery duct and operable to actuate said motor to move said damper in said one direction when the velocity of gas in said delivery duct decreases and to actuate said motor to move said damper in said opposite direction when the velocity of gas in said delivery duct increases.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |