应用概况

分析点 / 参数 分析物 测量范围 适合分析仪
酸气 acid gas 硫化氢 H2S 0-100% OMA 硫化氢分析仪
氨气 NH3 0-50%
二氧化碳 CO2 0-50% MCP-200 红外分析仪

测量前馈控制中的氨气

推荐使用: OMA 氨气分析仪

测量前馈控制中的二氧化碳

推荐使用: MCP-200 红外分析仪

测量前馈控制中的硫化氢

推荐使用: OMA 硫化氢分析仪

H2S is an extremely dangerous chemical which occurs naturally in fossil fuels and is removed through refining processes. The sulfur recovery unit (SRU) of a refinery converts the H2S to elemental sulfur which can be stored or sold off. A critical point in this process is the furnace which combusts H2S in order to sustain a 2:1 stoichiometric ratio of H2S:SO2 in the subsequent catalytic reaction. The amount of available oxygen in the furnace is carefully controlled to ensure this ratio for the next step. The efficiency of the entire SRU therefore hinges on the ability to continously measure the required amount of oxygen (i.e. "air demand") in the furnace.

While tail gas analysis measures the H2S:SO2 ratio after the furnace to calculate air demand correction, a feed forward analysis system measures the H2S concentration in the acid feed gas before the furnace to preemptively adjust air demand based on the real-time feed gas H2S level. While tail gas analysis provides the most accurate air demand calculation, this measurement occurs after the furnace. Feed forward analysis allows for air demand control with no process lag by immediately detecting sudden changes in acid feed gas composition and preventing any losses in SRU efficiency.

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