Study on the desulfurization performance of calcium-based desulfurizer and NaHCO 3  desulfurizer

Abstract The commonly used Ca-desulfurizers have low desulfurization efficiency, NaHCO3-desulfurizers can meet the requirements of desulfurization efficiency, but the high price and the difficulty in handling desulfurization products, make dry flue desulfurization technology quite difficult to realize the large-scale application. Preliminary research found a new Ca-desulfurizer, to understand its performance, comparing investigation into desulfurization performance of different Ca-desulfurizer and NaHCO3-desulfurizer. The results showed that with the high-performance Ca-desulfurizer, conventional NaHCO3-desulfurizer, and ultrafine NaHCO3-desulfurizer, the operating time with 100% desulfurization efficiency is 420, 360, and 100 min, when the flue temperature of 100~300 ℃, the “break-through” temperature is 260, 200, and 200 ℃, expand the use range of desulfurizer flue gas temperature. Regarding the desulfurizer per unit mass, the production costs of ultrafine NaHCO3-desulfurizer are 5.36 times higher than Ca-desulfurizer. Compared with NaHCO3-desulfurizer, high-performance Ca-desulfurizer is characterized by several advantages, including high desulfurization efficiency, wider applicable temperatures, and low preparation cost, allowing for significant development potential in flue gas desulfurization.