Pulsation amplitude control for pneumatically pulsated liquid
US4342654A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1981 |
| Grant date | Aug 3, 1982 |
| Priority date | — |
| Expiry date | Jun 22, 2001 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB03B5/24
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention concerns the separation of granular products of different density in a pneumatically pulsated liquid medium. To control the pulsation amplitude, the level of separation of two layers of the product is detected by a sensor which emits a corresponding control signal and the pulsating air is intermittently vented. The beginning of the venting is controlled after the air inlet valve has been opened completely, the termination of the air venting is controlled at the same time as the closing of the air inlet valve, and the duration of the venting is determined by the control signal from the level sensor. This signal is transmitted to a first input of a computer receiving the control signal and a second input receiving the output signal from a memory unit wherein the air inlet valve opening and closing program is stored, and the output signal of the computer controls the venting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.