The integration of humidification dehumidification desalination and flue gas desulfurization

摘要

This study was focused on modeling of the integration system of flue gas desulfurization (FGD) and humidification dehumidification desalination (HDD). The study dealt with the development of appropriate models for two alternative process flow structures intended for achieving the target of FCO by seawater while obtaining a fresh water credit. Each of the two schemes was dealt with separately. This included a brief description of the characteristic features of each scheme, models associated with the formulation of overall mass and heat balances, and the design equations used for rating the various components within each process scheme. The proposed model was applied to the operating conditions of the power plants in Kuwait, motivated by the large capacity of these plants and the use of high sulfur oil fuels. The analysis included sizing of the required HDD units, evaluation of the specific amounts of water generated relative to the plant power capacity, the design characteristics, and the performance of the flue gas/seawater heat exchanger and seawater absorption column for sulfur dioxide removal from the flue gases. The two alternative configurations were compared by summarizing the results of the major factors affecting the initial and operating costs associated with the different schemes.