Patent EP0098043A2 successfully refreshed from Google Patents.
EP0098043A2
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Partial oxidation burner and process
Assignee: Texaco Development Corp
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Filing: 1983-05-18
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Granted: —
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Expires: 2003-05-18
Abstract
Abstract A high turndown de-slagging burner is provided for simultaneously introducing one or two mixed pairs of reactant feedstreams into a free-flow non-catalytic partial oxidation gas generator for the production of synthesis gas, fuel gas, or reducing gas by way of the central and/or annular sections of the burner, respectively. Each pair of feedstreams comprises a stream of free-oxygen containing gas with or without a temperature moderator and a pumpable liquid slurry stream of solid carbonaceous fuel, such as a coal-water slurry. Other hydrocarbonaceous fuels may be employed. The burner comprises four coaxial conduits (4,5,6,7) that are radially spaced to provide coaxial concentric annular passages (51,53,56,59). All of the conduits and annular passages are closed at the upstream ends and open at the downstream ends. Each pair of feedstreams is separately mixed together in a central or annular pre-mix chamber (67,71) located upstream from the face (2) of the burner. A water-cooled flat face-plate (8) is provided with separate passages for discharging air or soot-blowing or de-slagging media at the face of the burner.
Inventors
- 👤 Warren Gleason Schlinger
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-26 20:33
CPC Classifications
F; F23; F23D; F23D1/00; F23D1/005; C; C01; C01B; C01B3/00; C01B3/02; C01B3/32; C01B3/34; C01B3/36; C01B3/363; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/50; C10J3/506; C10J3/72; C10J3/74; C10J3/76; C10J3/78; C10J2200/00; C10J2200/15; C10J2200/152; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0933; C10J2300/0943; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0969; C10J2300/0973; C10J2300/0976; Y; Y10; Y10S; Y10S48/00; Y10S48/07
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
570 words
A burner for introducing first and second reactant feedstreams into a partial oxidation gas generator and including a central conduit defining a central passage for a reactant feedstream and a second conduit coaxial therewith to define an annular passage for another reactant feedstream with the outlet end of the central conduit being retracted from the face of the burner to define a pre-mix chamber for the reactant streams in both said passages characterised by: a central conduit (4) closed at -its -upstream end and having an inlet (15) for a first reactant stream into the upstream end of the conduit (4) and an unobstructed exit nozzle at the downstream end thereof, which discharges through a circular exit orifice (68) located upstream from the face (2) of the burner to provide a central pre-mix chamber (67) that discharges through an unobstructed circular exit orifice at the face of the burner; a second conduit (5) extending along and held in a spaced coaxial relationship around said central conduit (4) to define an unobstructed first annular passage (53) having an unobstructed downstream annular exit orifice which discharges into said central pre-mix chamber (67), said annular passage (53) being closed at its upstream end with an inlet (16) being provided for introducing a second reactant feedstream into said first annular passage (53) at its upstream end, and an unobstructed exit nozzle (69) at the downstream end of the second conduit which discharges through the circular orifice of said central pre-mix chamber (67) at the face (2) of the burner; a third conduit (6) extending along and held in a spaced coaxial relationship around said second conduit (5) to define therebetween an unobstructed second annular passage (56) with an unobstructed downstream annular exit orifice (72) located upstream from the face of the burner to provide a portion of an annular pre-mix chamber (71) that discharges through an unobstructed annular exit orifice at the face (2) of the burner, said second annular passage (72) being closed at its upstream end with an inlet (17) being provided for introducing a third reactant feedstream into said second annular passage (56) at its upstream end; an outer conduit (7) extending along and. held in a spaced coaxial relationship around said third conduit (6) to define therebetween an unobstructed third annular passage (59) with an unobstructed downstream annular exit orifice located upstream from the face of the burner that discharges into the remaining portion of said annular pre-mix chamber (71), said third annular passage (59) being closed at its upstream end with an inlet (18) being provided for introducing a fourth reactant feedstream into said third annular passage (59) at the upstream end thereof; and an unobstructed exit nozzle (73) at the downstream end of the outer conduit which discharges through said annular exit orifice at the face (2) of the burner; an outer annular water-cooled flat face-plate (8) encircling the downstream end of the burner, said face-plate being cored to provide an annular passage (75) for circulating water and an annular header (65) for distributing a gaseous material, passage means (61) extending longitudinally in the wall of said outer conduit and in communication with said distribution header (65), inlet means (19) in communication with the upstream end of said longitudinal passage means for introducing said gaseous material, and downstream passage means (66) in communication with said distribution header for discharging said gaseous material at the face of the burner.
Claim 2
Dependent Claim
570 words
A burner for introducing first and second reactant feedstreams into a partial oxidation gas generator and including a central conduit defining a central passage for a reactant feedstream and a second conduit coaxial therewith to define an annular passage for another reactant feedstream with the outlet end of the central conduit being retracted from the face of the burner to define a pre-mix chamber for the reactant streams in both said passages characterised by: a central conduit (4) closed at -its -upstream end and having an inlet (15) for a first reactant stream into the upstream end of the conduit (4) and an unobstructed exit nozzle at the downstream end thereof, which discharges through a circular exit orifice (68) located upstream from the face (2) of the burner to provide a central pre-mix chamber (67) that discharges through an unobstructed circular exit orifice at the face of the burner; a second conduit (5) extending along and held in a spaced coaxial relationship around said central conduit (4) to define an unobstructed first annular passage (53) having an unobstructed downstream annular exit orifice which discharges into said central pre-mix chamber (67), said annular passage (53) being closed at its upstream end with an inlet (16) being provided for introducing a second reactant feedstream into said first annular passage (53) at its upstream end, and an unobstructed exit nozzle (69) at the downstream end of the second conduit which discharges through the circular orifice of said central pre-mix chamber (67) at the face (2) of the burner; a third conduit (6) extending along and held in a spaced coaxial relationship around said second conduit (5) to define therebetween an unobstructed second annular passage (56) with an unobstructed downstream annular exit orifice (72) located upstream from the face of the burner to provide a portion of an annular pre-mix chamber (71) that discharges through an unobstructed annular exit orifice at the face (2) of the burner, said second annular passage (72) being closed at its upstream end with an inlet (17) being provided for introducing a third reactant feedstream into said second annular passage (56) at its upstream end; an outer conduit (7) extending along and. held in a spaced coaxial relationship around said third conduit (6) to define therebetween an unobstructed third annular passage (59) with an unobstructed downstream annular exit orifice located upstream from the face of the burner that discharges into the remaining portion of said annular pre-mix chamber (71), said third annular passage (59) being closed at its upstream end with an inlet (18) being provided for introducing a fourth reactant feedstream into said third annular passage (59) at the upstream end thereof; and an unobstructed exit nozzle (73) at the downstream end of the outer conduit which discharges through said annular exit orifice at the face (2) of the burner; an outer annular water-cooled flat face-plate (8) encircling the downstream end of the burner, said face-plate being cored to provide an annular passage (75) for circulating water and an annular header (65) for distributing a gaseous material, passage means (61) extending longitudinally in the wall of said outer conduit and in communication with said distribution header (65), inlet means (19) in communication with the upstream end of said longitudinal passage means for introducing said gaseous material, and downstream passage means (66) in communication with said distribution header for discharging said gaseous material at the face of the burner.
Claim 3
Dependent Claim
22 words
A burner according to claim 1 provided with cooling coils (9) encircling the outside circumference of the burner at the downstream end.
Claim 4
Dependent Claim
57 words
A burner according to claim 1 or claim 2 wherein the downstream tips of the central and third coaxial conduits (4,6) are retracted upstream from the face of the burner a distance of greater than two times the minimum diameter of the exit orifice of the central pre-mix chamber (67) at the face (2) of the burner.
Claim 5
Dependent Claim
66 words
A burner according to claim 1 or claim 2 wherein the downstream tips (68,72) of the exit nozzles of the central and third coaxial conduits (4,6) are retracted upstream from the face of the burner a distance in the range of about 0.5 to 12 times the minimum diameter of the exit orifice of the central pre-mix chamber (67) at the face (2) of the burner.
Claim 6
Dependent Claim
41 words
A burner according to any preceding claim wherein each of said four coaxial conduits (4,5,6,7) are substantially cylindrical shaped with a downstream end that leads to a converging long radius frusto- conical shaped nozzle at the downstream end of the burner.
Claim 7
Dependent Claim
56 words
A burner according to any preceding claim wherein the passage means (66) connected to said distribution header is directed inwardly toward the central longitudinal burner axis for soot-blowing or de-slagging the burner with a gaseous material selected from the group consisting of steam, N 2 , C0 2 , recycled cooled product gas, and mixtures thereof.
Claim 8
Dependent Claim
42 words
A burner according to any preceding claim wherein said longitudinal passage means (61) in the wall of the outer conduit and the inlet means in communication thereof comprises a coaxial concentric annular shaped passage with a plurality of pipes in communication thereof.
Claim 9
Dependent Claim
31 words
A burner according to any one of claims 1 to 6 wherein said longitudinal passage means (61) in the wall of the outer conduit comprises a plurality of cylindrically shaped passages.
Claim 10
Dependent Claim
64 words
A burner according to any one of claims 1 to 8 wherein said downstream passage means (66) in communication with said distribution header (65) comprises a plurality of cylindrical shaped passages in a coaxial ring with the longitudinal central axis of said passages forming a right cylindrical or frus=- toconical shaped pattern with a converging angle in the range of about 0 to 45°.
Claim 11
Dependent Claim
25 words
A burner according to any preceding claim wherein said annular coolant passage (75) in the face-plate is an "L" shaped passage for circulating cooling water.
Claim 12
Dependent Claim
37 words
A burner according to any preceding claim wherein the downstream ends of the exit nozzles for said second and outer conduits (5;7) are provided with frustoconical shaped inserts (70,74) made from a thermal and wear resistant material.
Claim 13
Dependent Claim
575 words
A continuous process for the manufacture of gas mixtures comprising H 2 and CO, using a burner according to any preceding claim, which process includes the partial oxidation of a feedstream comprising a pumpable slurry of solid carbonaceous fuel in a liquid carrier and a feedstream of free-oxygen containing gas optionally in admixture with a temperature moderator, said partial oxidation occurring in the reaction zone of a free-flow gas generator at an autogenous temperature in the range of about 1700° to 3500°F (927 to 1927°C) and a pressure in the range of about 5 to 250 atmospheres (5 to 245 bars); said process comprising: (1) passing a first stream of a first reactant feedstream comprising a slurry of solid carbonaceous fuel in a liquid carrier in liquid phase at a temperature in the range of about ambient to 500°F (26O°C), a pressure in the range of about 5 to 250 atmospheres (5 to 245 bars), and a velocity in the range of about 1 to 50 ft. per second (0.3 to 15 m/sec) through either the central or first annular passage of the burner and into the central pre-mix chamber in said burner, (2) simultaneously and concurrently passing a second reactant feedstream comprising a free-oxygen containing gas optionally in admixture with steam through either the central conduit or the first annular passage whichever is free at a temperature in the range of about ambient to 1500°F (816°C), a pressure in the range of about 5 to 250 atmospheres (5 to 245 bars), and a velocity in the range of about 100 feet per second (30 m/sec) to sonic velocity; (3) mixing together said first and second reactant feedstreams from (1) and (2) in said centralpre-mix chamber and vaporizing about 0 to 100 volume % of said liquid carrier to produce a multiphase mixture at a temperature below its autoignition temperature and in which the ratio of the atoms of free-oxygen plus atoms of organically combined oxygen in the solid carbonaceous fuel per atom of carbon in the solid carbonaceous fuel (0/C atomic ratio) is in the range of 0.5 to 1.95; and the H 2 0/fuel weight ratio of lbs. (kg) of H 2 0 per lb. (kg) of solid carbonaceous fuel plus liquid hydrocarbonaceous material, if any, is in the range of about 0.1 to 3.0; (4) simultaneously and concurrently passing a second stream of said first reactant feedstream at substantially the same temperature, pressure, and velocity as specified in (1), through either the second or third annular passage of the burner and into the annular pre-mix chamber in the burner; (5) simultaneously and concurrently passing a second stream of said reactant feedstream at substantially the same temperature, pressure and velocity as specified in (2) through either the second or third annular passage of the burner whichever is free and into said annular pre-mix chamber; (6) mixing together said first and second reactant feedstream from (4) and (5) in said annular pre-mix chamber and vaporizing about 0 to 100 volume % of said liquid carrier to produce a multiphase mixture at a temperature below its autoignition temperature and having substantially the same 0/C atomic ratio and H 2 0/fuel weight ratio as specified in (3); (7) discharging the multiphase mixtures produced in the pre-mix chambers in (3) and (6) from the burner; and, (8) mixing together and reacting by partial oxidation the multiphase mixtures from (7) in the reaction zone of the gas generator.
References Cited (Backward Citations)
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