Abstract:

In this paper，such factors as concentration of sodium carbonate solution，pH value，temperature，intake rate，spray amount，residence time and thiobacillus desulfurization in the washing solution influencing on the desulfurization rate are inspected by single factor analysis，and initially defined the optimal conditions for the natural gas containing H₂S（concentration≤1300mg/m³） are as following，pH value is 8~9，temperature 25℃~35℃，initial concentration of the sodium carbonate solution 5%，residence time 90s.The experimental results also indicate that the spray amount and the intake rate influences the desulfurization rate，the regenerative lye which enters absorption tower carries thiobacillus desulfurization，which can help to improve desulfurization rate.

Key words: thiobacillus desulfurization, BDS, eddy diffusion coefficient, hydrogen sulfide, desulfurization rate