Experimental study on synergistic capture of fine particles and waste heat from flue gas using membrane condenser

摘要

This work proposes a new method for capturing fine particles based on heterogeneous condensation technology. The microporous ceramic membranes are used to manufacture membrane condenser, which is used to capture fine particles from the exhaust emitted by a natural gas-fired boiler. The effects of different operating conditions on fine particle capture efficiency, condensate water quality, condensation and thermal performance are investigated experimentally. In addition, the technical economy of membrane condenser applied in a 330 MW coal-fired generating unit is analyzed. The results show that membrane condenser can effectively capture fine particles from flue gas, and capture efficiency is positively related to the heterogeneous condensation intensity. Furthermore, membrane condenser has a good application prospect in thermal power plants. Based on the proposed evaluation method and application on the natural gas-fired boiler, this work studies the heterogeneous condensation performance from multiple dimensions, expands the application scenarios of device, and explores the feasibility of synergistic capture of fine particles, water vapor and waste heat. (C) 2020 Elsevier Ltd. All rights reserved.