Control system for a coal gasification plant
US4049394A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 1, 1976 |
| Grant date | Sep 20, 1977 |
| Priority date | — |
| Expiry date | Dec 1, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10J2300/0959
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A control system maintains a predetermined volumetric ratio between fine-particle fuel and a gasification agent which are fed separately into a reactor wherein the fuel is gasified under pressure. The control system includes a first measuring means responsive to the absorption of electromagnetic radiation by the fine-particle fuel in a fuel-feed line for producing a fuel-feed signal corresponding to the volumetric amount of fuel conducted by the line. A vehicle gas-feed signal is produced by a second measuring means in response to the volumetric amount of vehicle gas conducted by a line into the fuel-feed line for admixture with the fuel therein. Computing means is responsive to the fuel-feed signal and the vehicle gas-feed signal to produce a control signal according the expression: EQU U.sub.1 . (U.sub.2 - U.sub.v) for all values of U.sub.2 greater than U.sub.v where U.sub.1 corresponds to the reciprocal of the fuel-feed signal, U.sub.2 corresponds to the vehicle gas-feed signal and U.sub.v is a predetermined comparison signal constant. Control valves respond to the control signal to vary the volumetric amount of fuel and gasification agent introduced into the reactor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.