Abstract:

The principle, main desulphurization process and actual application of the desulphurization by ammonia are described. Practice shows that the desulphurization by ammonia for large capacity boilers is characterized by high efficiency, less investment and less electric power consumption, and sulfuric acid or ammonium sulfate can be produced. Even if the temperature of flue gas is not reduced and it is sent directly into desulphurization tower, the higher desulphurization efficiency can be obtained. Through the comparison of many kinds of processes, a reference is provided for the selection of flue gas desulphurization technology for coal firing.