Method of controlling the suction gas pressure of a sulfuric acid plant for treatment of smelter exhaust gas
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United States of America Patent
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Aug 4, 1981
Grant Date -
N/A
app pub date -
Oct 1, 1979
filing date -
Oct 7, 1978
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a system wherein exhaust gases containing SO.sub.2 are fed to a sulfuric acid plant from multiple furnaces, including an intermittently operated furnace (such as a copper or nickel converter furnace), a method of automatically controlling the gas pressure to within a predetermined range at a point just upstream of the exhaust gas pretreating equipment at the inlet of the sulfuric acid plant so as to compensate for the fluctuation in the exhaust gas pressure resulting from start up and stopping of the operation of the intermittently-operated furnace. By this method, the disadvantages caused by large gas fluctuations, i.e., the leakage of SO.sub.2 -containing gas and the suction of excess free air can be prevented.
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