Pressurized filtration system
US4439325A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1983 |
| Grant date | Mar 27, 1984 |
| Priority date | — |
| Expiry date | Jul 11, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D25/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus for controlling the operation of a primary filter press to insure the attainment of a desired quality cake in the press including a conduit for feeding a slurry or composition to the filter press, transducers responsive to the volume of slurry delivered to the filter press, the rate of flow, the pressure at the inlet to the press and the characteristics of the slurry solids for producing electric signals proportional thereto, relating at least certain of the signals to compute a quantity K indicative of the quality of the cake being formed in the press when the pressure to the filter press attains 90% of the terminal pressure and modifying the characteristics of the slurry to achieve the desired volume of K. The invention further comprehends the use of a pilot filter press of significantly smaller size than the primary press and fed by the same slurry and operated in the same manner. Since 90% of the terminal pressure in the pilot filter can be achieved in a very short time as compared with the primary press, the quantity K can be computed and adjusted long prior to the attainment of 90% of the terminal pressure in the primary filter press.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.