Huaibei, Anhui Tongling glass steel boiler precipitator dust and a smoke purification equipment

Using lime and limestone (CaCO3) as a sorbent desulfurization process, referred to as calcium method. It has a dry, wet and semi-dry in three, according to different production scale, conditions and demand and other by-products, the use of different methods. Lime and limestone are used as one of the earliest FGD absorber, especially abandoned law. Abandoned limestone for dry hair first, soon limestone (original state or calcined) is directly injected into the high temperature zone of the boiler, so that it captured in the flue gas after removal of sulfur compounds and react. Because of the low dry desulfurization efficiency, the large cool wet washing method, which uses limestone slurry in the scrubber to remove SO2. Limestone is widely distributed, almost everywhere, the general style open pit mining and low cost. And limestone sorbent can also be used as well as dolomite (CaCO3.MgCO3). Lime is made of limestone and processed, there are lime (Ca0) and calcium hydroxide [Ca (oh) 2] points, lime FGD generally used, site preparation can also be a commercially available. Large-capacity multi-use limestone FGD plant, mill site slurried use. 2. Sodium history in the flue gas desulfurization, sodium base compound more attention than other types of absorbent. Because of its strong affinity for SO2; sulfite; sodium sulfite chemical mechanism to adapt to absorption and in cyclic operation; salt solubility, and ability to maintain favorable absorbing compounds in the solution, thereby avoiding fouling and blockage within the scrubber. 3, the water-soluble alkaline ammonia ammonia, also SO2 absorbent. On industry, especially sulfuric acid tail gas treatment industry, often using the technology. This is a mature technology, to achieve good purification recovery, in fact, is the use of a washing process (NH4) 2 SO3-SO3-NH4HSO3 solution for SO2 absorption cycle, purification of flue gas, then a different approach to absorbing liquid process. Processing methods, the resulting by-product of medium-sized desulfurization system is also different. Desulfurization system for medium-sized chemical fertilizer and SO2 as a byproduct of the ammonia-acid (decomposition), direct product of ammonia sulfite ammonia - sulfur ammonia, will absorb ammonia liquor oxidation of ammonia sulfur-sulfur products, ammonia, gypsum product ammonia - gypsum method. For small desulphurization project general no recovery section. 4. Magnesium Magnesium called, is the use of alkaline earth metal oxides of magnesium hydroxide compounds as SO2 absorbent, flue gas purification process. Such processes are basically recycling law, and therefore, the process