烟气脱硫的大型脱硫装置称为脱硫塔，而用于燃煤工业锅炉和窑炉烟气脱硫的小型脱硫除尘装置多称为脱硫除尘器。在脱硫塔和脱硫除尘器中，应含SO 的烟气，对烟气中的2SO 进行化学吸收。为了强化吸收过
The desulfurization tower is a large-scale desulfurization device for flue gas desulfurization , and small desulfurization dust removal device used for desulfurating flue gas of industrial kilns and furnaces is more known as the desulfurization dust collector. The desulfurization tower and the desulfurization dust collector contain SO2 flue gas .The SO2 flue gas should be absorbed by chemical substances. In order to strengthen the absorption process ,improve the desulfurization efficiency, reduce the investment and operation cost of the equipment, the desulfurization tower and the desulfurization dust remover should meet the following basic requirements:
1, Between gas and liquid have a large contact area and a certain contact time;
2, Perturbation between gas and liquid is strong and the absorption resistance is small.
3, Stable operation and have a suitable operation flexibility;
4, The pressure is low when the air flow through it.
5, Simple structure,convenient manufacture and maintenance, low cost, long serving life;
6, Do not scale and plug.Wear resistance and corrosion resistance;
7, Low energy consumption and don't produce twice pollution.
The desulfurization tower commonly used in Domestic and foreign coal power plants has four kinds: spray tower, packed tower, double circuit tower and spray drum tower.