Reconstruction of Coal-fired Power Plants for Ultra-low Emission of Smoke and Its Technical and Economic Analysis
With the improvement of the industry standard and the rise of ultra-low emission of reconstruction in key areas,the wet electrostatic precipitator(WESP)as a terminal purification device, can not only reduce dust and droplet emission concentration, but also solve the problem of slurry restrained of the Flue Gas Desulfurization(FGD). And it has become one of the major solvents to control dust discharge for coal-fired power plant. This paper introduced the WESP and its application,taking a 600 MW coal-fired power unit with dust transformation as an example for technical and economic analysis. The results showed that: the smoke and dust removal efficiency of WESP can be achieved more than 75% and smoke concentration can be controlled below 10 mg/m3 under perfect working condition. Compared with other dust removal retrofit scheme, WESP has the lowest operating cost and can show the optimal economical efficiency in a long term.