Operation and Maintenance Cost Variance Analysis in the Resource Recovery Plant when Incinerate River Land Waste

• Main Authors: Shin-Jie Lu, 盧信智
• Other Authors: Kuo-Ching Chang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/79642897033266016595

碩士 === 國立屏東科技大學 === 環境工程與科學系 === 93 === This study work on the operation and maintenance cost variation of the municipal waste resource recovery plant when the original wastes combined with the flammable materials classified from the river land waste. The parameters in variance analysis include refuse characteristic, bottom ash and fly ash production, steam production, power per refuse incineration, loss of ignition, chemical agent consumption, and the flue gas emission. Furthermore, the influence of operation and maintenance cost was discussed. The results from this study work could be used for the political, technical and commercial consideration by the government when evaluating waste treatment of the river land wastes.The results of the variance analysis were as follows: The plastics and sand proportion are high in the river land waste composition. After mixing, the nitrogen (N) content increases 19.5%, the sulfur (S) content increases 15.4%, the organic chlorene increases 14.3%, and the carbon/nitrogen ratio (C/N) decreases 32.7%. When the river land waste percentage increases, the total bottom ash and fly ash increases 5%. The heating value, steam production, and ignition loss with the river land waste treatment load is not obviously relevant, only the loss of ignition of ashs has decreasingly tendency along with the treatment time. The emission of the HCl, CO, SO2, NH3 and opacity in flue gas has obviously increased. Lime consumption per refuse incinerated increases 43.8%, chelating agent consumption per refuse incinerate increases 21.0%, also becomes the direct ratio with the river land waste treatment load. When iincrease 1% river land waste treatment load, the lime consumption per refuse incinerate increases 184 g and chelating agent consumption per refuse incinerate increases 4 g.Increase of the river land waste treatment load may enhance the combustion efficiency and power profit and then increase the income of power sale, but the potential impactc on the incineration systems are the followings: The grate and grate bar may subject to abrasion, the refractory is easy to fall off and damages, the boiler water tube is easy to corrode and the bag filter is easy to break. The river land waste treatment load percentage study in this research were up to 31.4%, the emission value were not beyond the regulatory standard, that means the treatment load percentage could be increased further.