Sour Gas Feed Analyzer in Sulfur Recovery Units

摘要

Sour gas feed streams contain hydrogen sulfide (H_2S), ammonia (NH_3), water vapor, CO_2 and total hydrocarbons. The sour gas feed stream is sent to an oxidation furnace of a sulfur recovery unit where the H_2S is converted to elemental sulfur and sulfur dioxide. The combustion air requirement changes as the H_2S, NH3 and total hydrocarbon concentration fluctuates in the sour gas feed stream. An on-line infrared (IR) Photometer can be used to measure hydrogen sulfide, ammonia and total hydrocarbons in sour gas feed streams. The fast response time of the Photometer allows feedforward control of the airflow valve to the combustion furnace that provides the following benefits: 1. Maximize the efficiency of the sulfur recovery plant. 2. Protection of catalysts. 3. Ensure that environmental regulations are achieved. 4. Reduce sulfur plant operating problems.