Advantages and disadvantages of desulfurization and denitrification Engineering
时间: 2019-11-28 16:36
Power plants and enterprises with boilers are faced with environmental protection problems to be solved, generally flue gas desulfurization and denitration. Because untreated flue gas will cause quite serious pollution, so it must be treate
Power plants and enterprises with boilers are faced with environmental protection problems to be solved, generally flue gas desulfurization and denitration. Because untreated flue gas will cause quite serious pollution, so it must be treated. There are many methods for desulfurization and denitration. Today, Shandong Baolan Environmental Protection Engineering Co., Ltd. will introduce the advantages and disadvantages of desulfurization and denitration project for you.
For desulfurization and denitration engineering, the most commonly used is desulfurization after combustion, that is, flue gas desulfurization. Commonly used are wet and dry methods.
Advantages and disadvantages of dry flue gas desulfurization and denitrification project:
Dry flue gas desulfurization refers to the application of powder or granular absorbent, adsorbent or catalyst to remove SO2 from flue gas. Definition of dry flue gas desulfurization: CaCO3 injected into the furnace is calcined at high temperature and decomposed into Cao, which reacts with SO2 in the flue gas to generate calcium sulfate; SO2 is transformed into ammonia sulfate or sulfuric acid by electron beam irradiation or activated carbon adsorption, which is collectively referred to as dry flue gas desulfurization technology.
It has the advantages of simple process, no sewage and acid treatment, low energy consumption, especially high flue gas temperature after purification, which is conducive to chimney exhaust diffusion, without "white smoke" phenomenon, and the purified flue gas does not need secondary heating, with small corrosiveness; its disadvantages are low sulfur removal efficiency, large equipment, large investment, large floor area, and high technical requirements for operation. Therefore, dry desulfurization is not the main method.
Advantages and disadvantages of wet flue gas desulfurization and denitration project:
Wet flue gas desulfurization technology means that the absorbent is liquid or slurry. Because of the gas-liquid reaction, the reaction speed is fast, the efficiency is high, and the utilization rate of desulfurizer is high. The main disadvantages of this method are secondary pollution of desulfurization wastewater, easy scaling and corrosion of the system, high initial investment cost of desulfurization equipment and high operation cost.
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