| 摘要 |
In general, the invention features method for regulating sulfur dioxide emissions from the recovery furnace of a Kraft paper mill. The method includes: (a) identifying predetermined responses, wherein each said response either permits or inhibits adjustment of black liquor temperature and wherein adjustment of black liquor temperature is an increase or decrease in temperature, each said response being associated with a particular potential combination of the status of upper furnace temperature, hot zone temperature, and sulfur dioxide concentration within said furnace, said status being increasing, decreasing or unchanged; (b) periodically measuring upper furnace temperature, hot zone temperature, and sulfur dioxide concentration within said furnace; (c) determining whether upper furnace temperature, hot zone temperature, and sulfur dioxide concentration within said furnace is increasing, decreasing or is substantially unchanged; (d) using said determinations to calculate a composite state variable; (e) correlating said composite state variable with a said predetermined response; and (f) carrying out said predetermined response correlating to said composite state variable.
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