Method for removing sulfur dioxide from the exhaust of a combustion furnace
Abstract
Abstract THIS METHOD IS CHARACTERIZED BY THE FOLLOWING STEPS: CAUSING THE EXHAUST GAS OF A COMBUSTION FURNACE CONTAINING SO2 AND COKE OVEN GAS CONTAINING NH3 TO CONTACT TWO CIRCULATING SOLUTIONS SEPARATELY, IN EACH OF WHICH THERE ARE DISSOLVED AMMONIUM SULFITE, AMMONIUM BISULFITE AND AMMONIUM SULFATE; CIRCULATING A PORTION OF EACH OF SAID TWO SELF-CIRCULATING SOLUTIONS JOINTLY; CONTINOUSLY DRAWING OUT A PORTION OF SAID JOINTLY CIRCULATING SOLUTIONS; CONTINOUSLY SUPPLEMENTING A DECREASE OF SOLUTIONS IN ALL THE CIRCULATION SYSTEMS WITH FRESH WATER. AND MAINTAINING THE PH VALUE OF EACH CIRCULATING SOLUTION AT A LEVEL OF ABOUT 6.5 BY CONTROLLING THE FLOW RATES OF SAID COKE OVEN GAS AND JOINTLY CIRCULATING SOLUTION AND THE RATE AT WHICH THERE SHOULD BE DRAWN OUT A PORTION OF SAID JOINTLY CIRCULATING SOLUTION.
Inventors
- 👤 M Mizuno
- 👤 M Yoki
- 👤 K Saito
Bibliographic Details
Claims Analysis
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