Process and apparatus for automatically controlling the acid concentration in gas scrubbing solution
US4172880A · kind A · utility
17Cited by
4References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 27, 1978 |
| Grant date | Oct 30, 1979 |
| Priority date | — |
| Expiry date | Jun 27, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2509
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Optimum concentration of the acid-scrubbing solution employed in a scrubbing tower for removal of malodorous and/or toxic gases from the air is maintained automatically in a control system which senses the electrical conductivity of the solution to control acid-feeding apparatus. High and low concentration alarms are also provided to warn of malfunction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.