Glass-Lined Columns
The glass-lined columns range is available in nominal diameters from DN300 to DN4000. Glass-lined columns are key components in glass-lined tower systems, combining the corrosion resistance of a high-silica glass lining with the separation efficiency required for demanding process applications. Glass-lined columns are widely used in the chemical, pharmaceutical, agrochemical, and food industries for gas-liquid mass transfer, distillation, absorption, desorption, extraction, and other separation and purification processes.
The inner surface of each glass-lined column is lined with a high-silica glass coating and works together with internal tower components such as packing, trays, and bubble caps. This structure helps glass-lined columns deliver both reliable corrosion resistance and efficient separation performance in aggressive operating environments.
- The operating principle of glass-lined columns is based on distillation technology. The mixed feed enters the column at the middle section, while a reboiler at the bottom heats the liquid and causes part of it to vaporize. The vapor rises upward through the column, and a condenser at the top condenses the vapor. Part of the condensed liquid returns to the column as reflux, while the remaining portion is withdrawn as distillate.
- During the countercurrent contact between gas and liquid phases, the more volatile components continue to transfer into the vapor phase, while the less volatile components become concentrated in the liquid phase. In this way, glass-lined columns achieve effective separation and purification.
