发明名称 |
Process of continuously controlling the pH of an acid liquid including measuring the pH continuously with a glass electrode |
摘要 |
PCT No. PCT/EP93/03675 Sec. 371 Date Jul. 5, 1995 Sec. 102(e) Date Jul. 5, 1995 PCT Filed Dec. 23, 1993 PCT Pub. No. WO94/16369 PCT Pub. Date Jul. 21, 1994The method of continuously controlling pH of an acid scrubbing liquid includes continuously withdrawing a constant partial stream from the scrubbing liquid; continuously measuring a pH in the partial stream with a glass electrode; adding base at a first rate to the partial stream upstream of the glass electrode and continuing the adding until the measured pH is in a pH set-point range of from 2.5 to 11.5; after the pH is in the pH set-point range, changing the first rate of adding base to the constant partial stream to compensate any subsequently occurring pH deviations; during the changing of the first rate of base addition, measuring the first rate of base addition to obtain a measured first rate; and automatically controlling a pH of the acid scrubbing liquid using the measured first rate as a controlling parameter by selecting a rate set-point range of the first rate of adding base to the constant partial stream so that the measured pH can be brought into the pH set-point range of from 2.5 to 11.5 and adding base at a second rate to the acid scrubbing liquid from which the partial steam is withdrawn to compensate for any subsequent fluctuations of the measured first rate from the rate set-point range.
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申请公布号 |
US5643797(A) |
申请公布日期 |
1997.07.01 |
申请号 |
US19950495433 |
申请日期 |
1995.07.05 |
申请人 |
SCHMIDT, HANS J.;STEGEMANN, BERTOLD |
发明人 |
SCHMIDT, HANS J.;STEGEMANN, BERTOLD |
分类号 |
G01N27/416;G05D21/02;(IPC1-7):G01N35/08 |
主分类号 |
G01N27/416 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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