Fundamental Research for System Development of Semi-Dry Type Flue Gas Desulfurization Process

摘要

The increase of fossil fuel consumption due to indutrial activity growth and change of energy utilization pattern has caused the increase of fuel-derived sulfur dioxide emission, worsening ambient air quality in Korea in past decades. The very stringent emisson regulation to solve this problem is now accelerating the development of control technology. The main purpose of this study is to survey the possible control technologies and to try efficient and applicable ones through lab-scale and pilot scale experiments. Mass tranfer and relevant chemical reaction principles were investigated utilizing lab. scale experimental equipments for a liquid-dispersed system, or semi-dry type spray drying absorption system. Various operating conditions including slurry flow rate, stoichiomerric ratio, temperature have been investigated to obtain optimized system conditions. In spite of advantages of this system, it has its own limits in terms of system performance and absorbent utilization. Various efforts have been made to solve these problems. Experimental results showed some improvement in treatment efficiency when several operating parameters were changed and/or system units were differently applied. A scaled-up system connected to a utility boiler has been constructed and in process of initial-stage operation with some success.