Estimation of Theoretical Flame Temperatures for Claus Sulfur Recovery Unit Using a Simple Method
MetadataShow full item record
Recovery of elemental sulfur from industrial waste gases is an important problem both from environmental and economic perspectives. The most widely used process is the Claus process, where one-third of the acid gas is oxidized to SO2 in a reaction furnace using air. This combustion generates a large amount of heat. Further, the combustion products undergo Claus reaction between H2S and SO2. The aim of this study is to develop a simple-to-use predictive tool suitable for combustion engineers, which is easier than existing approaches less complicated with fewer computations for predicting the theoretical flame temperature for both straight-through operation and for a split-flow operation with two-thirds of the acid gas bypassing the combustion section. The proposed tools are formulated as a function of the temperature of the acid gas feeding the combustion section and the hydrogen sulphide mole fraction (dry basis) in feed gas. Results show that the proposed predictive tool has a very good agreement with the reported data where the average absolute deviation percent is less than 0.1%. The proposed method is superior owing to its accuracy and clear numerical background, wherein the relevant coefficients can be retuned quickly for various cases. This proposed simple-to-use approach can be of immense practical value for engineers and scientists to have a quick check on theoretical flame temperature for both straight-through operations as well as for a split-flow operation for a wide range of operating conditions without the necessity of any pilot plant set up and experimental trials. In particular, process and combustion engineers would find the proposed approach to be user friendly involving transparent calculations with no complex expressions for their applications to the design and operation of sulfur recovery Claus unit.
Showing items related by title, author, creator and subject.
Bahadori, Alireza (2011)When cooling combustion flue gas for heat recovery and efficiency gain, the temperature must not be allowed to drop below the sulfur trioxide dew point. Below the SO3 dew point, very corrosive sulfuric acid forms and leads ...
Shah, Kalpit Vrajeshkumar (2010)In case of PF firing, solid fuels such as coal and biomass undergo various chemical and physical transformations (devolatilization, char oxidation, fragmentation and gas to particle conversion followed by nucleation, ...
Development of accurate and reliable correlations for various design parameters in oil and gas processing industriesBahadori, Alireza (2011)The continuing growth in the importance of oil and gas production and processing overall the globe increase the need for accurate prediction of various parameters and their impact on unit operations, process simulation ...