Sulfur Recovery. The main feed streams to the SRU (Fig. 2) are acid gas from the AGRU regeneration column, which contains all H2S removed from the feed gas and the acid gas from the regeneration-gas treatment unit that contains the mercaptans removed in the MSU.
硫磺回收：輸至同步再生機組（SRU）的主給原料氣流（圖2）是來自AGRU再生塔的酸性氣體，這氣體中所含有的硫化氫是從含有硫醇（脫除自MSU）的再生氣體處理機組的原料氣和酸性氣裏脫離出來的。
While the first stream will have a fairly constant flow rate and composition, the stream from the regeneration-gas treatment will have significant variations in flow and composition from the regeneration cycle of the MSU. This second stream also will require a significantly higher air/ fuel ratio to ensure soot-free combustion.
雖然第壹組氣流有壹定的恒定流量和成分，但來自再生氣體處理機組的氣流，其所含有來自MSU再生循環的流量和成分卻有顯著的變異。這第二組氣流也將需要更高的空氣/燃料比例以確保無殘留的燃燒。
To ensure stable SRU operation, these streams are processed in a dualburner system. In addition, the large mercaptan peaks that are generated during the MSU regeneration process are smoothed out in a peak-shaving system that is part of the MSU-regeneration- gas treating unit.
為了確保同步再生機組的穩定運行，這兩組氣流是由壹個兩用燃燒器系統來處裏。另外，在MSU再生處裏過程中所出現的巨大硫醇高峰也可以通過其調峰系統來平滑掉。
The AGRU and MSU will remove only a small part of the COS in the feed gas. Most COS will be removed in the treating section of the NGL extraction unit. COS removed in the treating section of this unit also is routed to the SRU to ensure all sulfur containing streams are handled in that unit. The SRU is followed by a tail-gas treating (TGT) unit to improve overall sulfur recovery. Acid gas that is generated in this unit will be recycled back to the SRU.
AGRU及MSU只能從原料氣脫除壹小部分碳硫，大部分的碳硫是由液化天然氣提取機組的處裏裝置脫除。脫除的碳硫還被送到同步再生機組以確保所有含硫的氣流在這被處裏。緊接著還要通過壹個尾氣處裏裝置（TGT）以提高全部硫磺的回收；而從這裝置所產生的酸性氣體將被再循環回同步再生機組。
In the actual plant, the amine system of the TGT unit has been integrated with the AGRU, whereby semi lean solvent of the TGT unit will be cascaded to the AGRU column and the H2S recovered in the common AGRU regenerator. The last stream that is shown in Fig. 2 is CO2 from the AGRU enrichment section. This stream is treated within the AGRU to remove all H2S to improve overall sulfur recovery. The treated stream is routed to the SRU incinerator to ensure that small traces of H2S and hydrocarbons are properly combusted.
在真正的工廠裏，尾氣處裏裝置的胺體系已和AGRU再生器結合在壹起，這樣尾氣處裏裝置的半貧溶劑將被放泄至AGRU再生塔，再從***同的AGRU再生器將硫化氫回收。圖2 顯示的最後壹組氣流是來自ARGU富集部分的二氧化碳；這組氣流在ARGU內部被處理，將所有的硫化氫脫除以提高全部硫磺的回收。經過處理的氣流被輸送至SRU的焚化爐以確保硫化氫和碳氫化合物的些許遺跡被正確地燃燒。
The configuration described will ensure a sulfur-recovery system with a recovery greater than 99.5% and also will ensure that the unit will perform efficiently during feed-gas composition variations.
上述的配置將確保壹個高於99.5%的硫磺回收系統，同時也確保了在原料氣成分變異時。機組將照樣有效地運轉。