What are the differences in the application of the Claus process in refineries and coal chemical industries?

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Below are the three points I have summarized; everyone is welcome to offer additions and share their opinions. :) The raw materials for the two are different. The high-concentration hydrogen sulfide acidic gas in refineries mainly originates from the stripping of acidic wastewater. The acidic gases from coal chemical enterprises come from the low-temperature methanol washing process, the stripping gas from the shift process, and small amounts of sulfur-containing waste gas from other units. The acid gas concentration in petrochemical enterprises is generally high (>50%), with fewer impurities. The acid gas concentration in coal chemical enterprises is usually low and the impurities are high (>20%). There are also certain differences in their manufacturing processes. Coal chemical industry typically uses oxygen-enriched or pure oxygen processes. Petroleum chemical companies rarely use oxygen-enriched or pure oxygen processes.