NOVELTY - A sulfur recovery system (100) comprises: two sulfur removal systems (2, 4); a sulfur plant feed inlet (10) to the first sulfur removal system; at least one oxidizing gas inlet (110) arranged and disposed to combine at least one oxidizing gas stream with the sulfur plant feed stream to form a combustion gas for combustion in the first sulfur removal system at a second pressure; and a flow restriction device (118) operably configured to control the operating pressure in one or both of the sulfur removal systems.    USE - As sulfur recovery system for recovering sulfur from a sulfur plant feed stream; and in a gas processing plant (claimed). Also useful for installation in a refinery, natural gas plant, coal gasification, steel plant or any facility that implements a sulfur recovery process based on Claus or Claus-like technology.    ADVANTAGE - The sulfur recovery system provides more efficient sulfur removal, with greater process control (including pressure control) and does not require the capital-intensive equipment or complicated processes. The sulfur recovery system provides improved sulfur recovery efficiency due to improved catalytic activity and tail gas unit performance, lower sulfur vapor losses in the sulfur recovery unit tail gas stream, and lower liquid sulfur entrainment losses in the tail gas stream due to reduced gas velocities. The sulfur recovery system reduces liquid sulfur entrainment and reduces sulfur vapor losses due to the increased elevated operating pressure; and also reduces or eliminates substantial operating cost over known sulfur removal systems.    DETAILED DESCRIPTION - A sulfur recovery system (100) for recovering sulfur from a sulfur plant feed stream, comprises: two sulfur removal systems (2, 4); a sulfur plant feed inlet (10) to the first sulfur removal system, where the sulfur plant feed inlet is capable of providing the sulfur plant feed stream at a first pressure; at least one oxidizing gas inlet (110) arranged and disposed to combine at least one oxidizing gas stream with the sulfur plant feed stream to form a combustion gas for combustion in the first sulfur removal system at a second pressure; and a flow restriction device (118) operably configured to control the operating pressure in one or both of the first sulfur removal system and the second sulfur removal system.    INDEPENDENT CLAIMS are included for the following:    (1) a gas processing plant (P1), comprising a system for processing natural gas that produces natural gas and a sulfur plant feed stream; and the sulfur recovery system (S1) for recovering sulfur from the sulfur plant feed stream; and    (2) method (M1) for recovering sulfur from a sulfur containing stream, involving providing a first sulfur removal system and a second sulfur removal system; providing the sulfur containing stream at a first pressure; combining the sulfur containing stream with oxidizing gases to form a combustion gas; combusting the combustion gas at a second pressure; and controlling an operating pressure in one or both of the first sulfur removal system and the second sulfur removal system with a flow restriction device in response to the first pressure and second pressure.    DESCRIPTION OF DRAWING(S) - The figure shows view of the sulfur recovery unit.    First sulfur recovery system (2)    Second sulfur recovery system (4)    Sulfur plant feed inlet (10)    sulfur recovery unit (100)    Oxidizing gas inlet (110)    Flow restriction device (118)