| The pollution of sulfur dioxide is a momentous environmental problem concerning all the countries worldwide. China, as a big country consuming coal as main source of energy, exhausts the most amount of sulfur dioxide in the world. With the increasing attention paid to the environment protection by the country, it is urgent to reconstruct the power plants in order to control the amount of exhausted sulfur dioxide strictly. At present the adoption of an advanced and economical desulfurization technology is a focus of the environmental protection.In this paper, we researched the mechanism of sulfur dioxide absorption, set up an analytical method to determine the gas, investigated the influence of several operating parameters on stationary absorption-desorption of sulfur desorption, and compared and sieved features of different desulfurizing reagents. For the first time at home we proposed an innovative technical route to remove sulfur dioxide by absorption-desorption cycling, using amine compounds with steric hindrance effect.By using 1-Methyl-2-pyrrolidinone solution as absorbent and a Φ 100mm × 200mm packed tower in the lab, the suitable technical conditions of sulfur dioxide absorption and desorption were experimentally searched. Results show that the suitable conditions are as following: for absorption; the flow rate of flue gas is 0.2～0.3 L/min, the volume concentration of l-Methyl-2-pyrrolidinone in absorption solution is about 60%, while the absorption temperature is approximately 60℃, the abundant sulfur dioxide concentration in the absorbent can reach 25g/L. For desorption; the heating temperature of the desorption tower range from 80℃ to 100 ℃, nitrogen flow rate is 4～5L/min, residual sulfur dioxide concentration in the absorbent is 2~3g/L. Unit flue gas desulfurization expense of the proposed novel method were economically analyzed and compared, which is a little more than that of ethylene diamine/phosphoric Acid method .
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