On the Study of the Treatment on the Flue-Gas from a Spray Dryer in a Ceramic Tile Plant by Utilizing the Mobile-Bed Scrubbing Tower

• Main Authors: Mun-Sun Lee, 李穆生
• Other Authors: Chung-Te Lee
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/87102408311856327733

碩士 === 國立中央大學 === 環境工程研究所 === 82 === Ceramic tile is one of the major materials used widely in the building construction. The production and marketing of ceramic tiles are closely related with the construction industry. Along with the economy booming in Taiwan, the demand for the production of ceramic tile is increased year by year. The average yearly growth rate of the production is about 15% from the year of 1983 to 1993. Unfortunately, the production of ceramic tile causes pollution and worsens the air quality. To promote the production without contaminating the environment, the factories should install control equipments and maintain good operation and housekeeping. A pilot plant of mobile-bed scrubbing tower with 3 kinds of openings in the supporting tray is established in this study to investigate its performance on treating the waste gas emitted from spray dryer of a ceramic tile plant. An semi- empirical equation states the minimum fluidized gas velocity (MFV ) isproposed based on the dimension analysis and the experimental data in this work as the following : Ugmf = 46.5*(f*D/d)^0.665*Ul^-0.08. The effects of the operation conditions of the scrubbering tower on particle penetration were evaluated in terms of MFV, liquid to gas flow ratio, and pressure loss. Optimal conditions for different openings in the supporting tray of the tower are listed. In most runs, the effluent after mobile-bed treatment could reach the current emission standard (200mg/Nm), some could even be better than 1995 standard (100mg/Nm). From the results of cost- effective analysis on the installation cost, operating cost, raw material recovery, waste-water treatment, and the cost of unit waste removal, the choice of 43.3% opening in the supporting tray of the tower is the best one. It is estimated that the increase of the cost by installing the mobile-bed scrubber as the pollution control equipment in the ceramic tile plant is 0.56 NT dollar per squared meter of ceramic tile produced.