Sulfur Dioxide Production Process

nuroil.com - http://www.nuroil.com/sulphur.aspx Sulfur is an extremely useful element. Its largest application is for the actual manufacture of fertilizers with other principal users including rubberized industries, cosmetics, and pharmaceuticals. Sulfur is present in many organic industrial gases and in gas in the form of hydrogen sulfide. The actual noxious hydrogen sulfide fumes that characterize many gas processing, refinery operations, and petroleum production sites represent an authentic threat to our environment.<br> <br> Claus Sulfur Recovery Units are generally classified according to the method utilized for the production of SO2 and the technique used to reheat the switch bed feeds. The various reheat methods can be used with any SO2 production method, whereas the technique used for the creation of SO2 is determined by the actual H2S content of the acid gas feedstock.<br> <br> Most sulfur recovery plants utilize one of three basic variations of the Modified Claus Process "straight through, " "split-flow, inch or "direct-oxidation. " "Acid gas enrichment" can be applied ahead of the SRU to produce a richer acid gas stream as well as "oxygen enrichment" may be used in combination with any of these variations.<br> <br> These three varieties of the Modified Claus Process differ in the method used to oxidize H2S and produce SO2 ahead of the very first catalytic reactor. The first two processes use a flame reaction furnace ahead of the catalytic stages. The third process reacts o2 directly with the H2S in the first catalytic reactor to create the SO2.<br> <br> Straight-Through Process A "straight-through" unit (shown on Figure 2) passes all the acid gas with the combustion burner and response furnace. The initial free-flame response usually converts more than half from the incoming sulfur prices - https://beroilenergy.com/sulphur-supplier/ to necessary sulfur. This reduces the amount which must be handled by the catalytic sections and thus leads to the highest overall sulfur recuperation.<br> <br> The amount of heat generated in the reaction depends on the amount of H2S available to the burner. Along with rich acid gas (60% - 100% H2S), the response heat keeps the fire temperature above 2200°F. When the gas is leaner, the actual flame temperature is decreased; the greater mass is heated to a lower temperature. When the temperature falls below a vital point, approximately 1800°F in order to 2000°F, the flame gets unstable and cannot be managed.<br> <br> This point is usually reached once the acid gas has an H2S content of 50% or less. The problem can be overcome, within limits, by preheating the acid gas and/or air flow before it enters the burner. However , the lower the actual H2S content, the higher the preheat requirement becomes; once the gas composition falls below about 40% H2S, this method ceases to be practical.