Semi-Dry Flue Gas Desulfurization

Description:

This process based on the principle of the circulating fluidized bed and dry state lime powder Ca (OH) 2 as the absorbent. By absorber multiple recycling, extended contact time of flue gas and absorbent in the desulfurization tower, In order to achieve a purpose of efficient desulfurization, While greatly improving the utilization of absorbent. Desulfurization slag is a mixture of a free-flowing powder, no secondary pollution, but also can be further utilized. Mainly used in power plant desulfurization.

Chemical reaction:

1. SO2+H2O→H2SO3 SO3+H2O→H2SO4

2. Ca(OH)2+H2SO3→CaSO3+2H2O Ca(OH)2+2HF→CaF2+2H2O

Ca(OH)2+H2SO4→CaSO4+2H2O Ca(OH)2+2HCI→CaCI2+2H2O

3. CaSO3+1/2O2→CaSO4

System components:

1. Desulfurization preparation system

2. Desulfurization tower system

3. ESP Systems

4. Process water system

5. flue gas system

6. Desulfurization ash recycling system