US3659786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and installation for burning combustible mixtures
Assignee: Wintershall AG
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Filing: 1970-12-23
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Granted: 1972-05-02
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Expires: 1990-12-23
Abstract
Abstract A process and burner installation for burning combustible waste product sludges containing solid particulate contaminants, including a nozzle chamber adapted to mix the waste sludge with pressurized air. The static air pressure in the nozzle chamber is maintained at a predetermined pressure head in order to regulate the inlet of sludge to the chamber, so as to thereby effect control over the ratio of sludge to air in the mixture formed for burning.
Inventors
- 👤 Fritz Vier
- 👤 Bernhard Winkeler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:12
CPC Classifications
F; F23; F23G; F23G7/00; F23G7/001
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
149 words
A process for burning a pumpable combustible mixture, such as oil-bearing waste product sludges or the like, containing particulate contaminants, in a burner including nozzle structure having a chamber and a nozzle tip at one end thereof; said process comprising the steps of: supplying a controlled volume of pressurized primary air to said nozzle chamber; conveying a quantity of sludge into said nozzle chamber at a point remote from said nozzle tip in predetermined controlled proportion to the volume of said primary air; mixing said primary air and said sludge to form a combustible sludge-air admixture in said nozzle chamber; adjusting the pressure head of said primary air to vary the effective sludge inlet area into said nozzle chamber and thereby regulate the ratio between said primary air and said sludge; and continuously ejecting said sludge-air admixture through said nozzle tip into said burner for combustion of said admixture.
Claim 2
Dependent Claim
149 words
A process for burning a pumpable combustible mixture, such as oil-bearing waste product sludges or the like, containing particulate contaminants, in a burner including nozzle structure having a chamber and a nozzle tip at one end thereof; said process comprising the steps of: supplying a controlled volume of pressurized primary air to said nozzle chamber; conveying a quantity of sludge into said nozzle chamber at a point remote from said nozzle tip in predetermined controlled proportion to the volume of said primary air; mixing said primary air and said sludge to form a combustible sludge-air admixture in said nozzle chamber; adjusting the pressure head of said primary air to vary the effective sludge inlet area into said nozzle chamber and thereby regulate the ratio between said primary air and said sludge; and continuously ejecting said sludge-air admixture through said nozzle tip into said burner for combustion of said admixture.
Claim 3
Dependent Claim
46 words
A process as claimed in claim 1, comprising the further step of; supplying a controlled volume of pressurized secondary air to said nozzle chamber, said secondary air being adapted to mingle with said primary air-sludge admixture so as to enhance the combustion properties of said admixture.
Claim 4
Dependent Claim
33 words
A process as claimed in claim 2, comprising the step of agitating said secondary air upon conveyance into said nozzle chamber in order to increase its mixing rate with the primary air-sludge admixture.
Claim 5
Dependent Claim
31 words
A process as claimed in claim 2, wherein said secondary air is conveyed into said nozzle chamber into contact with said primary air-sludge admixture in the region adjacent said nozzle tip.
Claim 6
Dependent Claim
100 words
A process as claimed in claim 1, wherein said sludge is conveyed into said nozzle chamber under a static pressure head of at least about 3 meters of water, wherein the static head at the inlet of said primary air into said nozzle chamber is at least 20 meters of water higher than the static pressure head of said primary air-sludge admixture reacting on the effective sludge inlet area of said nozzle chamber, and wherein the static pressure head of the sludge being conveyed into said nozzle chamber is in the range of about 4 to 10 meters of water.
Claim 7
Dependent Claim
99 words
A process as claimed in claim 1, including tank means for said particulate contaminated sludge and pump means for homogenizing said sludge prior to conveyance thereof to said nozzle chamber, comprising the steps of; conveying said sludge from said tank means to said pump means, homogenizing said sludge in said pump means, and recirculating said homogenized sludge under pressure to said tank means, withdrawing at least a component portion of said pressurized homogenized sludge from the sludge being return to said tank means, conveying said component sludge portion under controlled conditions to the sludge inlet of said nozzle chamber.
Claim 8
Dependent Claim
49 words
A process as claimed in claim 6, including withdrawing a plurality of component portions of said pressurized homogenized sludge from the sludge being returned to said tank means, and conveying one or more of said component sludge portions under controlled conditions to the sludge inlet of said nozzle chamber.
Claim 9
Dependent Claim
33 words
A process as claimed in claim 6, including the step of; introducing a quantity of steam into said tank means so as to heat said sludge to a temperature of about 80*-95* C.
Claim 10
Dependent Claim
46 words
A process as claimed in claim 1, wherein said oil-bearing sludge comprises an oil content of from about 50 percent to 90 percent, a particulate contaminants content of from about 0 to 10 percent, and a water content of from about 10 percent to 40 percent.
Claim 11
Dependent Claim
28 words
A process as claimed in claim 1, comprising the step of; injecting a combustible material into said nozzle chamber to enhance the combustion characteristics of said sludge-air admixture.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |