脱硫塔是对工业废气进行脱硫处理的塔式设备。脱硫塔最初以花岗岩砌筑的应用的最为广泛，其利用水膜脱硫除尘原理，又名花岗岩水膜脱硫除尘器，或名麻石水膜脱硫除尘器。
The desulfurization tower is a tower type equipment for desulfurizing industrial waste gas. At first, the desulfurization tower was built with granite, which was widely used. It used the principle of water film desulfurization and dust removal, also known as granite water film desulfurization and dust removal, or water film desulfurization and dust removal of linen.
优点是易维护，且可通过配制不同的除尘剂，同时达到除尘和脱硫（脱氮）的效果。现在随着玻璃钢技术的发展，脱硫塔逐渐改为用玻璃钢制造。相比花岗岩脱硫塔，玻璃钢脱硫塔成本低、加工容易、不锈不烂、重量轻，因此成为今后脱硫塔的发展趋势。另外316L不锈钢具有耐腐蚀、耐高温、耐磨损三大优势，也是脱硫塔发展重要趋势之一。经过多年的改进，已发展成文丘里型、旋流板型、旋流柱型、浮球型、筛板型、气动乳化型等各种类型的脱硫塔，设备技术日趋成熟，各有优点和不足，企业可依自身需要选用不同类型。
The advantages are easy maintenance, and different dedusting agents can be prepared to achieve the effect of dedusting and desulfurization (denitrification). Now with the development of FRP technology, the desulfurization tower is gradually changed to FRP. Compared with granite desulfurization tower, FRP desulfurization tower has the advantages of low cost, easy processing, stainless and rotten, light weight, so it will become the development trend of desulfurization tower in the future. In addition, 316L stainless steel has three advantages of corrosion resistance, high temperature resistance and wear resistance, which is also one of the important trends of desulfurization tower development. After years of development has been improved, the desulfurization tower venturi type, written swirl plate, vortex column type, float type, plate type, pneumatic emulsifying type and other types of equipment, technology matures, each has advantages and disadvantages, according to their own need to choose different types of enterprises.