Exhaust Air Treatment
Environmental protection has become a factor of ever increasing importance not only to the industry but for the whole society. The most noticeable emission of viscose plants are the gaseous wastes consisting of CS2 and H2S, both released during the processing of the fibre. These contaminants are collected in exhaust air streams. CS2 is, nowadays to an extent of 95% recovered and recycled to the process. The remaining waste air stream is collected and treated by a catalytic wet oxidation process, MAURER’s WGR (WasteGasRecovery) technology. Suitable for the desulphurisation of waste air with a broad range of CS2 / H2S-concentrations. Sulphuric acid is generated as a valuable by-product and can be reused in the viscose process.