Method for recovery of elemental sulfur from low hydrogen sulfide sulfur plant feed gas专利检索-酸性气体天然气燃料气体燃料种类专利检索查询-专利查询网

Method for recovery of elemental sulfur from low hydrogen sulfide sulfur plant feed gas

阅读：162发布：2023-04-14

专利汇可以提供Method for recovery of elemental sulfur from low hydrogen sulfide sulfur plant feed gas专利检索，专利查询，专利分析的服务。并且Claus-type processes used in the past to recover sulfur from low H2S acid gases have not been satisfactory because hydrocarbons and other impurities in the acid gas deactivate the Claus catalyst. A method is described which overcomes this problem. The method involves using only straight-through operation. Flame stability is achieved by preheating the feed gases and by burning supplemental fuel gas in a primary zone and then burning the acid gas in a secondary zone of the furnace. Two types of furnaces employing the invention are discussed.，下面是Method for recovery of elemental sulfur from low hydrogen sulfide sulfur plant feed gas专利的具体信息内容。

权利要求

1. MIXING SAID FEED STREAM WITH AIR,

1. mixing said feed stream with air,

1. In a process for the recovery of free sulfur from a feed stream containing less than 45 mol % H2S and contaminated with hydrocarbons, the improvement comprising mixing a portion of said stream with a hydrocarbon gas and air and burning the resulting mixture in the forward portion of a combustion zone, said air being present in an amount sufficient to convert the hydrocarbon gas to CO2 and H2O and to provide an H2S/SO2 molar ratio not greater than about 0.2 whereby the presence of SO3 is suppressed, discharging the hot combustion products thus formed into the rearward portion of said combustion zone where they are mixed with the remainder of said feed stream at a temperature ranging from about 2,000*F to about 2,800*F, withdrawing an effluent from said rearward portion containing H2S and SO2 in an approximate molar ratio of 2:1 and substantially free from hydrocarbons, removing elemental sulfur from said effluent, and thereafter reacting the H2S and SO2 in the resulting sulfuR denuded effluent in contact with a catalyst for the reaction to produce sulfur in a known manner.

2. simultaneously and separately burning a gaseous hydrocarbon with air in an amount in excess of that necessary to convert said gaseous hydrocarbon into CO2 and water, discharging the products from steps 1 and 2 into a noncatalytic reaction zone where free sulfur is formed at a temperature ranging from about 2,000* to about 2,800*F, withdrawing an effluent from said reaction zone containing H2S and SO2 in a molar ratio of about 2:1, removing the sulfur therefrom, and thereafter reacting the H2S and SO2 in the resulting sulfur-denuded effluent in contact with a catalyst for the reaction to produce sulfur in a known manner.

2. The process of claim 1 wherein said air and said portion of said feed stream are preheated to from about 300* to about 600*F prior to introduction thereof into said combustion zone.

2. SIMULTANEOUSLY AND SEPARATELY BURNING A GASEOUS HYDROCARBON WITH AIR IN AN AMOUNT IN EXCESS OF THAT NECESSARY TO CONVERT SAID GASEOUS HYDROCARBON INTO CO2 AND WATER, DISCHARGING THE PRODUCTS FROM STEPS 1 AND 2 INTO NONCATALYTIC REACTION ZONE WHERE FREE SULFUR IS FORMED AT A TEMPERATURE RANGING FROM ABOUT 2,000* TO ABOUT 2,800*F, WITHDRAWING AN EFFLUENT FROM SAID REACTION ZONE CONTAINING H2S AND SO2 IN A MOLAR RATIO OF ABOUT 2:1, REMOVING THE SULFUR THEREFROM, AND THEREAFTER REACTING THE H2S AND SO2 IN THE RESULTING SULFUR-DENUDED EFFLUENT IN CONTACT WITH A CATALYST FOR THE REACTION TO PRODUCE SULFUR IN A KNOWN MANNER.

4. The process of claim 3 wherein the air and said stream are preheated to from about 300 to about 600*F prior to step 1.

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Method for recovery of elemental sulfur from low hydrogen sulfide sulfur plant feed gas

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