Acid gas burner

Claim 2

An acid gas burner for feeding H2S-containing gas to a combustion chamber of a thermal reactor of a sulfur plant, said burner including: a gas-feeding tube having a forward cylindrical portion, that in use extends horizontally within, coaxial with and spaced from the forward cylindrical portion of an air-supply tube and through a wall of the reactor into the chamber and that has a flared open end; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said open end of said gas-feeding tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared end of said gas-feeding tube at the annular space for diverging forward outflow of acid gas from the gas-feeding tube; a shaft connected to the rear end of said diverter and extending rearwardly through the gas-feeding tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said gas-feeding tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said gas-feeding tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said gas-feeding tube and being constructed to permit relative movement of said shaft with respect to said support means; means mounted on said gas-feeding tube and operatively associated with said shaft adjacent said other end of said shaft to move and position said shaft along its longitudinal axis for adjustment of the width of the annular space between said diverter and said flared open end of said gas-feeding tube; and means mounted on the burner to limit rearward axial movement of said diverter by said shaft to prevent closing of said annular space.

Claim 3

The burner of claim 1 wherein said diverter has bosses on said outer margin of said frustoconical surface facing said open end of said gas-feeding tube to constitute said means to limit the rearward axial movement of said diverter.

Claim 4

The burner of claim 2 wherein said diverter is a one-piece rEfractory member that is resistant to corrosion by the acid gas and is heat-resistant.

Claim 5

The burner of claim 3 wherein said diverter is a silicon nitride-bonded silicon carbide refractory and wherein said diverter has a rearward threaded cylindrical extension from said portion having said frustoconical surface, said burner further including means to couple said extension to the forward end of said shaft.

Claim 6

The burner of claim 2 wherein said diverter comprises: a conical metal sheet; gussets connected to said shaft and to said conical sheet to connect said sheet to said shaft; and a cast refractory secured to the entire forward face of said conical metal sheet, said refractory having a dished front face, and wherein said bosses are metal and are connected to the rear frustoconical surface of said sheet at its margin.

Claim 7

An acid gas burner for feeding H2S-containing gas to a combustion chamber of a thermal reactor, said burner including: a gas-feeding tube having a forward cylindrical portion, that in use extends horizontally through a wall of the reactor into the chamber and has a flared open end; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said flared open end of said tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared open end of said tube at the annular space for diverging forward outflow of acid gas from the tube; a shaft connected to the rear end of said diverter and extending rearwardly through the tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said tube and being constructed to permit relative axial movement of said shaft with respect to that support means; means adjacent said other end of said shaft to move said shaft longitudinally for axial movement of said diverter relative to said flared open end of said tube; and bosses on said outer margin of said frustoconical surface facing said flared open end of said tube to limit the rearward axial movement of said diverter by said shaft-moving means to prevent closing said annular space, said diverter being a one-piece member of silicon nitride-bonded silicon carbide refractory and having a rearward threaded cylindrical extension from said portion having said frustoconical surface, and said burner further including means to couple said extension to the forward end of said shaft.

Claim 8

An acid gas burner for feeding H2S-containing gas to a combustion chamber of a thermal reactor, said burner including: a gas-feeding tube having a forward cylindrical portion, that in use extends horizontally through a wall of the reactor into the chamber and has a flared open end; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said flared open end of said tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared open end of said tube at the annular space for diverging forward outflow of acid gas from the tube; a shaft connected to the rear end of said diverter and extending rearwardly through the tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said tube and being constructed to permit relative axial movement of said shaft with respect to that support means; means adjacent said other end of said shaft to move said shaft longitudinally for axial movement of said diverter relative to said flared open end of said tube; and bosses on said outer margin of said frustoconical surface facing said flared open end of said tube to limit the rearward axial movement of said diverter by said shaft-moving means to prevent closing said annular space, said diverter being a one-piece member of silicon nitride-bonded silicon carbide refractory and having a rearward threaded cylindrical extension from said portion having said frustoconical surface, and said burner further including means to couple said extension to the forward end of said shaft.

Claim 9

An acid gas burner for feeding H2S-containing gas to a combustion chamber of a thermal reactor, said burner including: a gas-feeding tube having a forward cylindrical portion, that in use extends horizontally through a wall of the reactor into the chamber and has a flared open end; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said flared open end of said tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared open end of said tube at the annular space for diverging forward outflow of acid gas from the tube; a shaft connected to the rear end of said diverter and extending rearwardly through the tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said tube and being constructed to permit relative axial movement of said shaft with respect to that support means; means adjacent said other end of said shaft to move said shaft longitudinally for axial movement of said diverter relative to said flared open end of said tube; and metal bosses mounted on said outer margin of said frustoconical surface facing said flared open end of said tube to limit the rearward axial movement of said diverter by said shaft-moving means to prevent closing of said annular space, said diverter comprising: a conical metal sheet on the rear surface of which said bosses are mounted; gussets connected to said shaft and to said conical sheet to connect said sheet to said shaft; and a cast refractory secured to the entire forward face of said conical metal sheet, said refractory having a dished front face.

Claim 10

An acid gas burner for feeding H2S-containing gas to a combustion chamber of a thermal reactor, said burner including: a gas-feeding tube having a forward cylindrical portion, that in use extends horizontally through a wall of the reactor into the chamber and has a flared open end; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said flared open end of said tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared open end of said tube at the annular space for diverging forward outflow of acid gas from the tube; a shaft connected to the rear end of said diverter and extending rearwardly through the tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said tube and being constructed to permit relative axial movement of said shaft with respect to that support means; means adjacent said other end of said shaft to move said shaft longitudinally for axial movement of said diverter relative to said flared open end of said tube; and metal bosses mounted on said outer margin of said frustoconical surface facing said flared open end of said tube to limit the rearward axial movement of said diverter by said shaft-moving means to prevent closing of said annular space, said diverter comprising: a conical metal sheet on the rear surface of which said bosses are mounted; gussets connected to said shaft and to said conical sheet to connect said sheet to said shaft; and a cast refractory secured to the entire forward face of said conical metal sheet, said refractory having a dished front face.

Claim 11

A thermal reactor for the oxidation by air of a part of the H2S content of the acid gas to SO2 which comprises: a housing providing a combustion chamber and having an opening in a wall; means to supply air through the opening to the chamber, said means including an air-supply tube having a forward cylindrical portion extending horizontally to said opening and said means being constructed so that air moving through the forward portion of said air-supply tube will flow in a generally linear manner parallel to the longitudinal axis of the forward portion of that tube; and a burner for feeding said acid gas through said opening in said housing to said combustion chamber, said burner including: a gas-feeding tube having a forward cylindrical portion within, coaxial with and spaced from said forward portion of said air-supply tube and extending forwardly of said air-supply tube into said housing, said forward portion of said gas-feeding tube at its open end being flared; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said open end of said gas-feeding tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared end of said gas-feeding tube at the annular space for diverging forward outflow of acid gas from the gas-feeding tube; a shaft connected to the rear end of said diverter and extending rearwardly through the gas-feeding tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said gas-feeding tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said gas-feeding tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said gas-feeding tube and being constructed to permit relative movement of said shaft with respect to said support means; means mounted on said gas-feeding tube and operatively associated with said shaft adjacent said other end of said shaft to move and position said shaft along its longitudinal axis for adjustment of the width of the annular space between said diverter and said flared open end of said gas-feeding tube; and means mounted on said burner to limit rearward axial movement of said diverter by said shaft to prevent closing of said annular space.

Claim 12

A thermal reactor for the oxidation by air of a part of the H2S content of the acid gas to SO2 which comprises: a housing providing a combustion chamber and having an opening in a wall; means to supply air through the opening to the chamber, said means including an air-supply tube having a forward cylindrical portion extending horizontally to said opening and said means being constructed so that air moving through the forward portion of said air-supply tube will flow in a generally linear manner parallel to the longitudinal axis of the forward portion of that tube; and a burner for feeding said acid gas through said opening in said housing to said combustion chamber, said burner including: a gas-feeding tube having a forward cylindrical portion within, coaxial with and spaced from said forward portion of said air-supply tube and extending forwardly of said air-supply tube into said housing, said forward portion of said gas-feeding tube at its open end being flared; a gas diverter concentrically disposed in that open end to provide an annular space between said diverter and said open end of said gas-feeding tube, said diverter having a rearward portion with a frustoconical surface having its outer margin facing the inner surface of that flared end of said gas-feeding tube at the annular space for diverging forward outflow of acid gas from the gas-feeding tube; a shaft connected to the rear end of said diverter and extending rearwardly through the gas-feeding tube to an external location for the other end of said shaft, said shaft being concentrically disposed with respect to the forward portion of said gas-feeding tube; means adjacent said other end of said shaft to support said shaft; means within the forward portion of said gas-feeding tube and adjacent said diverter to provide an intermediate support for said shaft, said intermediate support means being supported by said forward portion of said gas-feeding tube and being constructed to permit relative movement of said shaft with respect to said support means; means mounted on said gas-feeding tube and operatively associated with said shaft adjacent said other end of said shaft to move and position said shaft along its longitudinal axis for adjustment of the width of the annular space between said diverter and said flared open end of said gas-feeding tube; and means mounted on said burner to limit rearward axial movement of said diverter by said shaft to prevent closing of said annular space.

Claim 13

The thermal reactor of claim 8 wherein: said diverter has bosses on said outer margin of said frustoconical surface facing said open end of said gas-feeding tube to constitute said means to limit the rearward axial movement of said diverter; and said diverter is a one-piece member of silicon nitride-bonded silicon carbide refractory and has a rearward threaded cylindrical extension from said portion having said frustoconical surface, said burner further including means to couple said extension of said diverter to the forward end of said shaft.