| 摘要 |
Claus-type processes used in the past to recover sulfur from low H2S acid gas, in the presence of hydrocarbon or other impurities which are harmful to the Claus catalyst, have required the use of straight-through operation with the burning of supplemental fuel gas to maintain the required combustion temperature in the furnace. A method for conserving the amount of additional fuel gas required involving utilization of the excess heat of combustion to preheat the acid gas and oxygen-containing streams to a temperature in excess of 600 DEG F prior to combustion is described. Additional energy savings are achieved by preheating the Claus tail gas effluent prior to incineration. |
