| abstract |
The invention belongs to technical field of sulfur recovery, be specifically related to a kind of recovery technology of sulfur reducing sulfur dioxide (SO2) emissions.Including thermal response unit, catalytic reaction unit and cleaning of off-gas unit, on the basis of traditional Crouse's+SCOT tail gas treatment process, add ammonia absorption tank, in ammonia absorption tank, cleaning of off-gas is removed H 2 S, it is ensured that H in cleaning of off-gas 2 S content is less than 5mg/m 3 ；Deposed ammonia processes to sewage stripping device, can extract H respectively at sewage stripping device 2 S and ammonia, the H extracted 2 S returns sulfur recovery facility and carries out sulfur recovery, and the ammonia extracted returns ammonia water tank and recycles；Final sulphur unit flue gas SO 2 Concentration of emission can be down to 100mg/m 3 Hereinafter, meet the new environmental protection standard that will perform, provide a kind of small investment for newly-built sulphur unit, new method that operating cost is low.There is good absorbing effect, simple to operate, expense is low, environmental protection, the advantage of saving. |