Dual fuel burner

Claim 2

In a burner mountable in a passageway exiting into a furnace, including: a. a housing, received by said passageway, opening into said furnace; b. a first conduit within said housing; c. a second conduit within said first conduit; d. means for introducing first fluid between said first and second conduits; e. means for introducing second fluid into said second conduit; f. means for introducing third fluid between said housing and said first conduit; g. means proximate said housing opening, for inducing swirling motion to third fluid discharged from said housing into said furnace; h. means attached to said first conduit for discharging said first and second fluids into said furnace through said housing opening; the improvement comprising: i. said housing opening extending into said furnace; j. said discharge means being recessed within said housing; k. said swirl-inducing means being recessed within said housing from said discharge means outlet; l. said discharge means including:

Claim 3

an outer member receiving said first fluid from said first conduit, having an open end facing said housing opening, said outer member about said open end tapering away from said housing opening; 2. an inner member, interior of and spaced from said outer member, receiving said second fluid from said second conduit, including i. a cavity therewithin communicating with said outer member open end; ii. passageways therethrough connecting said second conduit with said cavity; iii. channels therethrough connecting said cavity with said space between said inner and outer members; wherein associated channels and passageways communicate with said cavity at a common location.

Claim 4

an outer member receiving said first fluid from said first conduit, having an open end facing said housing opening, said outer member about said open end tapering away from said housing opening; 2. an inner member, interior of and spaced from said outer member, receiving said second fluid from said second conduit, including i. a cavity therewithin communicating with said outer member open end; ii. passageways therethrough connecting said second conduit with said cavity; iii. channels therethrough connecting said cavity with said space between said inner and outer members; wherein associated channels and passageways communicate with said cavity at a common location.

Claim 5

In a burner mountable in a passageway leading into a furnace, including: a. a hollow housing received by said passageway, having a discharge end opening into said furnace; b. a first conduit, within said housing; c. a second conduit, within said first conduit; wherein said housing, said first conduit and said second conduit are respectively annularly spaced; d. means for introducing respective fuels into space between said first and second conduits and into said second conduit; e. means for introducing a gas into space between said housing and said first conduit; f. fins within said housing, proximate said housing discharge end, for inducing swirling motion of gas discharged from said housing into said furnace; g. means for discharging respective fuels from said first and second conduits into said furnace through said housing discharge end; the improvement comprising: h. said housing discharge end extending into the furnace interior; i. said discharge means being recessed within said housing from said housing discharge end; j. said discharge means comprising: 1. a sleeve receiving said first conduit therewithin and extending forwardly therefrom; 2. a cap connected to the end of said sleeve proximate said housing discharge end, including an inwardly facing lip about a discharge end thereof proximate said housing discharge end, said lip defining the outlet end of said discharge means; and 3. a nozzle interior of and spaced annularly from said sleeve, connected to the discharge end of said second conduit, including: a. a chamber therewithin communicating with said second conduit; b. a recess facing said housing discharge end, recess periphery contacting said lip of said cap; c. channels therewithin extending from space between said sleeve and said nozzle into said recess, channel orientation being defined by half chords of a circle having a center at the longitudinal axis of said nozzle; d. conduits connecting said chamber and said channels; and k. said fins being recessed within said housing from the outlet end of said discharge means.

Claim 6

In a burner mountable in a passageway leading into a furnace, including: a. a hollow housing received by said passageway, having a discharge end opening into said furnace; b. a first conduit, within said housing; c. a second conduit, within said first conduit; wherein said housing, said first conduit and said second conduit are respectively annularly spaced; d. means for introducing respective fuels into space between said first and second conduits and into said second conduit; e. means for introducing a gas into space between said housing and said first conduit; f. fins within said housing, proximate said housing discharge end, for inducing swirling motion of gas discharged from said housing into said furnace; g. means for discharging respective fuels from said first and second conduits into said furnace through said housing discharge end; the improvement comprising: h. said housing discharge end extending into the furnace interior; i. said discharge means being recessed within said housing from said housing discharge end; j. said discharge means comprising: 1. a sleeve receiving said first conduit therewithin and extending forwardly therefrom; 2. a cap connected to the end of said sleeve proximate said housing discharge end, including an inwardly facing lip about a discharge end thereof proximate said housing discharge end, said lip defining the outlet end of said discharge means; and 3. a nozzle interior of and spaced annularly from said sleeve, connected to the discharge end of said second conduit, including: a. a chamber therewithin communicating with said second conduit; b. a recess facing said housing discharge end, recess periphery contacting said lip of said cap; c. channels therewithin extending from space between said sleeve and said nozzle into said recess, channel orientation being defined by half chords of a circle having a center at the longitudinal axis of said nozzle; d. conduits connecting said chamber and said channels; and k. said fins being recessed within said housing from the outlet end of said discharge means.

Claim 7

In a burner for mounting in a passageway leading into a furnace, including: a. a hollow housing complementally received by said passageway, having a discharge end opening into said furnace; b. a first conduit, within said housing, having a discharge end proximate said housing discharge end; c. a second conduit, within said housing, having a discharge end proximate said housing discharge end; wherein said housing, said first conduit and said second conduit are respectively annularly spaced apart, d. means for introducing respective fuels into space between said first and second conduits and into said second conduit; e. means for introducing air into space between said housing and said first conduit; f. fins within said housing, proximate said housing discharge end, for inducing swirling motion of air discharged from said housing into said furnace; g. means, at said discharge end of said first conduit, for discharging respective fuels from said first and second conduits into said furnace through said housing discharge end; the improvement comprising: h. said housing discharge end extending into the furnace interior; i. said discharge means being recessed within said housing from said housing discharge end; j. said discharge means further comprising:

Claim 8

In a burner for mounting in a passageway leading into a furnace, including: a. a hollow housing complementally received by said passageway, having a discharge end opening into said furnace; b. a first conduit, within said housing, having a discharge end proximate said housing discharge end; c. a second conduit, within said housing, having a discharge end proximate said housing discharge end; wherein said housing, said first conduit and said second conduit are respectively annularly spaced apart, d. means for introducing respective fuels into space between said first and second conduits and into said second conduit; e. means for introducing air into space between said housing and said first conduit; f. fins within said housing, proximate said housing discharge end, for inducing swirling motion of air discharged from said housing into said furnace; g. means, at said discharge end of said first conduit, for discharging respective fuels from said first and second conduits into said furnace through said housing discharge end; the improvement comprising: h. said housing discharge end extending into the furnace interior; i. said discharge means being recessed within said housing from said housing discharge end; j. said discharge means further comprising:

Claim 9

a sleeve threadedly engaging said first conduit discharge end for receipt of fluid from said first conduit by said sleeve interior; 2. a cap forward of said sleeve, threadedly engaging said sleeve and coaxial with said cap, having a radially inwardly extending annular lip about a cap discharge end proximate said housing discharge end, an inner circular edge of said lip defining a discharge means outlet; 3. a nozzle within and annularly spaced from a lateral wall of said sleeve, connected to the discharge end of said second conduit, including: i. a chamber therewithin communicating with said second conduit for receipt of fluid therefrom; ii. a cylindrical recess formed therein facing said housing discharge end, the recess cylindrical wall being aligned with said inner circular edge of said lip; iii. channels formed therewithin connecting annular space between said sleeve and said nozzle with said recess, said channels having flat bottoms, channel sides being normal to said channel bottoms, said channel bottoms being coplanar with the bottom surface of said recess; iv. conduits connecting said chamber with said channels and said recess, said conduits communicating with respective channels at channel-recess juncture; k. said lip abutting said nozzle about said recess and covering said channels to thereby define closed tops of said channels; l. said fins being recessed within said housing from said discharge means outlet end.

Claim 10

a sleeve threadedly engaging said first conduit discharge end for receipt of fluid from said first conduit by said sleeve interior; 2. a cap forward of said sleeve, threadedly engaging said sleeve and coaxial with said cap, having a radially inwardly extending annular lip about a cap discharge end proximate said housing discharge end, an inner circular edge of said lip defining a discharge means outlet; 3. a nozzle within and annularly spaced from a lateral wall of said sleeve, connected to the discharge end of said second conduit, including: i. a chamber therewithin communicating with said second conduit for receipt of fluid therefrom; ii. a cylindrical recess formed therein facing said housing discharge end, the recess cylindrical wall being aligned with said inner circular edge of said lip; iii. channels formed therewithin connecting annular space between said sleeve and said nozzle with said recess, said channels having flat bottoms, channel sides being normal to said channel bottoms, said channel bottoms being coplanar with the bottom surface of said recess; iv. conduits connecting said chamber with said channels and said recess, said conduits communicating with respective channels at channel-recess juncture; k. said lip abutting said nozzle about said recess and covering said channels to thereby define closed tops of said channels; l. said fins being recessed within said housing from said discharge means outlet end.

Claim 11

Apparatus of claim 3 wherein said lip has a curved inner edge.

Claim 12

Apparatus of claim 4 wherein said nozzle and said housing are coaxial and said edge curves substantially continuously from orientation substantially parallel said axis to orientation substantially perpendicular to said axis and coplanar with the surface of said lip facing said furnace interior.

Claim 13

Apparatus of claim 5 wherein said channels are normal to the axis of said nozzle.

Claim 14

Apparatus of claim 3 wherein the radially outer periphery of said lip tapers away from said housing discharge opening.

Claim 15

Apparatus of claim 7 wherein said channels are defined by partial chords of a circle having a center at the axis of said nozzle.

Claim 16

Apparatus of claim 3 wherein said nozzle has an external annular shoulder formed thereon facing oppositely from said housing discharge end; wherein said discharge means outlet end is intermediate said shoulder and said housing discharge end; wherein said apparatus further comprises means contacting said shoulder for biasing said nozzle towards said housing discharge end, against said lip.

Claim 17

Apparatus of claim 9 wherein said bias means is a coil spring aligned with said axis.