Patent US3589314A successfully refreshed from Google Patents.
US3589314A
Expired / Lapsed
US
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Method and device for pressure spraying and burning a coal dust-water mixture
Assignee: Siemens AG
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Filing: 1969-07-11
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Granted: 1971-06-29
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Expires: 1989-07-11
Abstract
Abstract Method of pressure spraying and burning a coal dust-water mixture includes heating the coal dust and the water contained in the mixture, prior to discharging the same from a nozzle at a pressure of several atmospheres excess pressure, to a temperature that is just below the water-vaporizing temperature corresponding to the pressure produced upstream of the nozzle so that the water is pressure-relieved and vaporizes directly after passing through the nozzle; and device for carrying out the method.
Inventors
- 👤 Herbert Tratz
- 👤 Aribert Fracke
- 👤 Eduard Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:46
CPC Classifications
F; F23; F23D; F23D1/00; F23D1/005
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
72 words
Method of pressure spraying and burning a coal dust-water mixture which comprises heating the coal dust and the water contained in the mixture, prior to discharging the same from a nozzle at a pressure of several atmospheres excess pressure, to a temperature that is just below the water-vaporizing temperature corresponding to the pressure produced upstream of the nozzle, so that the water is pressure-relieved and vaporizes directly after passing through the nozzle.
Claim 2
Dependent Claim
72 words
Method of pressure spraying and burning a coal dust-water mixture which comprises heating the coal dust and the water contained in the mixture, prior to discharging the same from a nozzle at a pressure of several atmospheres excess pressure, to a temperature that is just below the water-vaporizing temperature corresponding to the pressure produced upstream of the nozzle, so that the water is pressure-relieved and vaporizes directly after passing through the nozzle.
Claim 3
Dependent Claim
58 words
Device for pressure spraying and burning a coal dust-water mixture comprising a supply line for the coal dust-water mixture, means for heating said supply line to a temperature just below vaporizing temperature of the water in said supply line, and orifice means at an end of said supply line for discharging the coal dust-water mixture in a spray.
Claim 4
Dependent Claim
58 words
Device for pressure spraying and burning a coal dust-water mixture comprising a supply line for the coal dust-water mixture, means for heating said supply line to a temperature just below vaporizing temperature of the water in said supply line, and orifice means at an end of said supply line for discharging the coal dust-water mixture in a spray.
Claim 5
Dependent Claim
27 words
Device according to claim 2 wherein said orifice means comprises a plate closing said end of said supply line, said plate being formed with an axial bore.
Claim 6
Dependent Claim
41 words
Device according to claim 2 wherein said end of said supply line is closed by a plate and said orifice means comprises an end portion of said supply line located adjacent said plate and formed with at least one radial bore.
Claim 7
Dependent Claim
19 words
Device according to claim 2 including a flow-twisting device received in said supply line upstream of said orifice means.
Claim 8
Dependent Claim
92 words
System of pressure spraying and burning a coal dust-water mixture comprising coal dust-water mixture supply means, a supply line connecting said supply means to a combustion chamber, pump means disposed in said supply line for pressurizing the mixture therein, means for heating the mixture in the supply line to a temperature just below the vaporizing temperature of water at the prevailing pressure of the mixture in the supply line, and orifice means at the downstream end of said supply for discharging the mixture in pressure-relieved and vaporized form into said combustion chamber.
Claim 9
Dependent Claim
92 words
System of pressure spraying and burning a coal dust-water mixture comprising coal dust-water mixture supply means, a supply line connecting said supply means to a combustion chamber, pump means disposed in said supply line for pressurizing the mixture therein, means for heating the mixture in the supply line to a temperature just below the vaporizing temperature of water at the prevailing pressure of the mixture in the supply line, and orifice means at the downstream end of said supply for discharging the mixture in pressure-relieved and vaporized form into said combustion chamber.
Claim 10
Dependent Claim
30 words
System according to claim 6 including a return line branching off from said supply line at a location downstream of said pump for returning excess mixture to said supply means.
Claim 11
Dependent Claim
17 words
System according to claim 6 wherein said heating means comprises a heat exchanger traversable by superheated steam.
Claim 12
Dependent Claim
18 words
System according to claim 6 wherein said heating means comprises an electric heater located adjacent said supply line.
Claim 13
Dependent Claim
30 words
System according to claim 6 wherein a length of said supply line upstream of said heating means extends into said combustion chamber for preheating the mixture passing through said length.
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |