Reactor for producing furnace carbon black

A reactor for producing furnace carbon black by thermal decomposition of liquid hydrocarbons in hot combustion gases, comprising:

• an elongated reactor member having a forward end, a rearward end, a longitudinal median axis, and an interior jacket of fire resistant material, said jacket having in sequence from said forward end to said rearward end, a first reactor section, a second constricting reactor section and a third reactor section, said reactor member further including filler means for filling in a portion of said first reactor section, said filler means having a rearward wall and a forward wall with said forward wall being essentially coincident with the forward end of said reactor member;
• said first reactor section having an inner wall defining a cylindrical channel therein with the channel having a first end coincident with the rearward wall of said filler means, a medium channel axis coincident with the longitudinal median axis of said reactor member and a second end, said first reactor section also having an internal surface defining a laterally extending bore with the bore opening into the channel and extending out to and through a peripheral portion of said reactor member, said bore being positioned rearwardly of the rearward wall of said filler means and forwardly of the second end of the channel, and a portion of the inner wall defining the channel rearward of the bore and forward of the second end of the channel being in a transverse relationship with the internal surface defining the bore such that a sharp edge is formed at the intersection of the inner wall and the internal surface;
• said second constricting reactor section including an inner wall defining a through-hole, the through-hole opening into the channel in said first reactor section and having a central axis coinciding with the median axis of the channel, and a portion of said through-hole having a cross-sectional area which, in the direction from the forward end towards the rearward end of said reaction member, symmetrically constricts;
• said third reactor section including an inner wall defining a conical channel therethrough, the conical channel opening into the through-hole of said second constricting reactor section and having a cross-sectional area which increases in the direction from the forward end towards the rearward end of said reactor member, the conical channel in said third reactor section and the through-hole in said second constricting reactor section having a cross-sectional area at the junction of said third reactor section and said second constricting reactor section which is essentially equal;
• spray nozzle means extending into the channel in said third reactor section for introducing a liquid quenching medium;
• a movable lancelike spray device for introducing carbon black raw material into said reactor member supported by said reactor member and extending into the forward end of said reactor member along the longitudinal median axis of said reactor member;
• means defining a combustion chamber having a first open end and an end wall essentially closing the other end, with the open end of said combustion chamber connected to said reactor member such that a median axis of said combustion chamber coincides with a median axis of the bore in said first reactor section, and the median axis of the bore formed in said first reactor section intersects and is essentially perpendicular to the median axis of the channel formed in said first reactor section such that combustion gases passing through said combustion chamber impact on the inner wall defining said cylindrical channel and thus are abruptly deflected in passing from said combustion chamber towards said second constricting reactor section.

A reactor for producing furnace carbon black by thermal decomposition of liquid hydrocarbons in hot combustion gases, comprising:

• an elongated reactor member having a forward end, a rearward end, a longitudinal median axis, and an interior jacket of fire resistant material, said jacket having in sequence from said forward end to said rearward end, a first reactor section, a second constricting reactor section and a third reactor section;
• said first reactor section having an inner wall defining cylindrical channel therein with the channel having a first end generally coincident with the forward end of said reactor member, a median channel axis coincident with the longitudinal median axis of said reactor member and a second end, said first reactor section further including an internal surface defining a laterally extending bore with the bore opening into the channel and extending out to and through a peripheral portion of said reactor member, said bore being positioned rearwardly of the forward end of said reactor member and forwardly of the second end of said channel, and a portion of the inner wall defining the channel rearward of the bore and forward of the second end of the channel being in a transverse relationship with the internal surface defining the bore such that a sharp edge is formed at the intersection of the inner wall and the internal surface;
• said second constricting reactor section including an inner wall defining a through-hole, the through-hole opening into the channel in said first reaction section, a first portion of the through-hole having a cross-sectional area which, in the direction from the forward end towards the rearward end of said reactor member, symmetrically constricts;
• said third reactor section including an inner wall defining a channel therethrough, the channel opening into the through-hole of said second constricting reactor section;
• means extending into the channel in said third reactor section for introducing a liquid quenching medium;
• means for introducing carbon black raw material into said reactor member supported by said reactor member and extending into the forward end of said reactor member along the longitudinal median axis of said reactor member;
• means defining a combustion chamber having a first open end and an end wall essentially closing the other end, with the open end of said combustion chamber connected to said reactor member such that a median axis of said combustion chamber coincides with a median axis of the lateral bore in said first reactor section, and the median axis of said combustion chamber and the longitudinal median axis of said reactor member lie on a common plane and intersect at about a right angle such that combustion gases passing through said combustion chamber impact on the inner wall defining said cylindrical channel and thus are abruptly deflected in passing from said combustion chamber towards said second constricting reactor section.