Data processing: generic control systems or specific application – Specific application – apparatus or process – Chemical process control or monitoring system
Patent
1997-02-11
2000-02-22
Straub, Gary P.
Data processing: generic control systems or specific application
Specific application, apparatus or process
Chemical process control or monitoring system
42324301, 42324308, 423DIG5, 422105, 422168, 700282, G05B 600
Patent
active
060291001
ABSTRACT:
There is provided a method for flue gas desulfurization which is capable of conducting minute control of oxidation and which is capable of maintaining the concentration of sulfurous acid in an absorbent liquid within a proper range in a highly reliable and efficient manner, even in the case where an abrupt change occurs in the operational conditions of the system. In the method for controlling the oxidation in flue gas desulfurization, the value of proportional sensitivity K in the feed back control process, which is based primarily on the oxidation-reduction potential, is increased depending on the deviation .epsilon. in a region where the detected oxidation reduction potential value PN is below the target oxidation reduction potential value SN in correspondence with the characteristic change of the oxidation-reduction potential against the concentration of sulfurous acid.
REFERENCES:
patent: 5766563 (1998-06-01), Tanaka et al.
Perry et al. "Chemical Engineers' Handbook" 5th Edition McGraw-Hill Book Co. USA, pp. 22-19 to 22-33, ISBN No. 0-07-049478-9, 1973, no month.
Iwashita Koichiro
Okino Susumu
Sakamoto Masaru
Ukawa Naohiko
Lieberstein Eugene
Meller Michael N.
Mitsubishi Jukogyo Kabushiki Kaisha
Straub Gary P.
Vanoy Timothy C
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