Removing sulfur dioxide from industrial waste gas by ammonia regeneration circulation process

Application Number: 00116112
Application Date: 2000.09.22
Publication Number: 1345621
Publication Date: 2002.04.24
Priority Information:
International: B01D53/50;B01D53/79;B01D53/96
Applicant(s) Name: Zhang Zhide
Address:
Inventor(s) Name: Zhang Zhide
Patent Agency Code: 52100
Patent Agent: yu dunhan
Abstract In present invention the solutions of (NH4)2 CO2 or ammonia water or (NH4)2SO3, etc. is used as absorption agent to absorb SO2 in industrial water gas, the saturated absorption solution can be regenerated and cyclically used by the following methods: 1. transferring saturated absorption solution into calcificatino regeneration barrel, adding CaCO3 fine powder or lime powder, heating, stirring, collecting, cooling and water absoption reaction to make NH3 and CO2 escape from barrel interior so as to obtain regenerated (NH4)2CO3 absorption solution or regenerated ammonia water; 2. transferring saturated absorption solution into oxidation tank, adding catalyst, heating air and oxidizing (NH4)2SO3 being in saturated solutino into (NH4)2SO4, transferring the above-mentioned material into calcification regeneration barrel, adding CaCO3 fine powder, stirring and heating to produce double decomposition reaction, collecting, cooling, water absorption to make NH4 and CO2 escape to obtain regenerated (NH4)2CO3 absorption solution, the residue CaSO4 sludge can be used as raw material for producing cement; and 2. converting the absorbed SO2 into element S to regenerate absorption solution.