The amount of natural sulfur in nature is very small. Therefore, most of the sulfur needs to be prepared through industrial production to meet the needs of domestic industry, agriculture, medicine and other fields.
So how is sulfur powder produced? One method is by mining pyrite, which is specially produced by soil method, boiling roasting method and semi-magnetic roasting reduction method. But at present, the more important way is to adopt sulfur recovery technology, as an environmental protection by-product of petroleum, petrochemical, metallurgy, fertilizer and other industries, from sulfide-containing acid gas.
With the gradual improvement of people’s environmental protection awareness and the increasingly strict national environmental protection regulations, in recent years, various refineries, natural gas purification plants, coking plants, fertilizer plants, power plants, coal gasification plants, etc. are building or expanding existing sulfur recovery plants.
Sulfur recovery usually consists of three parts: sour gas combustion, conventional Claus and tail gas treatment. According to the different H2S content in acid gas, it can be divided into several combustion technologies such as air flow method, split flow method and oxygen-enriched method. and so on. For the newly built sulfur recovery unit, the reduction absorption process represented by SCOT is mostly selected. Although this type of process has high investment and consumption indicators, it has strong adaptability to the Claus sulfur recovery device, high purification degree, and sulfur recovery rate as high as 99.8%. craft.