Sustainable Mining and Metallurgy

The sulfur dioxide converter using traditional single stage axial gas distribution devices is prone to problems such as uneven flue gas distribution, large temperature difference at the temperature measurement points of the catalyst layer, and substandard sulfur oxidation conversion rate. In order to find out the fundamentally cause of the problem and solve the problem, the gas distribution effect of single-stage axial gas distribution device was analyzed with the help of computational fluid dynamics simulation software. A new type of axial gas distribution device was proposed based on the idea of multi-stage gas distribution, and the dimensions of key factors affecting the gas distribution effect and pressure drop of the new axial gas distribution device were optimized and studied. The traditional single stage axial gas distribution device has a single structure. Affected by the throttling factor of the sieve orifice plate, there are significant velocity and flow differences after the airflow through the sieve orifice and the airflow that is blocked by the sieve orifice plate reaches the surface of the catalyst layer, resulting in uneven gas distribution of the gas distribution device. Through multi-stage gas distribution, the new axial gas distribution device effectively overcomes the gas distribution defects of the single stage sieve plate, and its performance has been tested in practical engineering applications. After the technical transformation, the sulfur dioxide conversion rate, catalyst bed temperature difference, sulfuric acid production and other indicators have been significantly improved.