Method for the transportation of a particulate material at controlled rate
US4758117A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 17, 1985 |
| Grant date | Jul 19, 1988 |
| Priority date | — |
| Expiry date | Oct 17, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G53/66
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention provides an efficient method for controlling the flow rate of a particulate material through a pneumatic transportation pipe at a preset value with a high accuracy and rapid response to an external disturbance added to the system by controlling the flow rate of the booster gas. Different from conventional methods in which the flow rate of the booster gas is controlled with the feedforward factor of the variation in the actual flow rate of the particulate material, the inventive method utilizes the variation in the pressure in the receiving unit as the feedback to control the flow rate of the booster gas so that the above mentioned advantages are obtained in the accuracy of control and rapidness of the response to an external disturbance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.