Use of Wire Matrix Inserts in Thermosiphon Reboilers in the Lower Operating Range

Abstract

For the assessment of separation technologies from an ecological and economic perspective, a case study was performed to investigate the influence of entrainment on energy and resource demand of a single apparatus and on a single production process. Taking the example of the Rectisol process, the influence of droplet entrainment on individual separation equipment as well as on the process as a whole was identified via flowsheet simulation. Based on the calculated mass and energy balances, an LCA and LCC approach was used for the quantification of the entrainment influence.

Machine Learning Supports Robust Operation of Thermosiphon Reboilers

“…The latter is particularly supported because an above‐average number of outliers was found for circulating flows near 0 kg h −1 and for high circulating flows, whereby instabilities are typically to be expected here. For circulating flows between 300 and 400 kg h −1 , it could also be shown for the investigated TR that fluctuations exist between laminar and turbulent flow and that associated instabilities occur 21.…”

“…The condensed vapor is recirculated to the phase separator. A detailed description of the experimental setup is given by Lu et al [21].…”

Operational Performance of a Thermosiphon Reboiler under Foaming Conditions

“…Comparison of the temperatures at the inlet of the evaporator showed higher subcooling at lower temperature differences, which can be explained by higher heat losses in the circulation line at lower circulation velocities [18]. With respect to heat transfer, no differences were observed in the temperature profiles for different surfactant concentrations.…”

“…This is due to the fact that the slope of the vapor pressure curve declines with decreasing pressure. Consequently, with lower pressure, more sensible heat is required to heat the liquid to boiling temperature and integral heat transfer is impaired [18]. At driving temperature differences greater than 40 K a slight reduction in heat transfer was observed during the evaporation of the surfactant-laden solutions.…”

“…This is due to the fact that the slope of the vapor pressure curve declines with decreasing pressure. Consequently, with lower pressure, more sensible heat is required to heat the liquid to boiling temperature and integral heat transfer is impaired[18].…”