Control system for a coal gasification plant

Patent · Tue Sep 20 04:00:00 EDT 1977

OSTI ID:7209428

Gernhardt, P; Grams, W; Danguillier, W; Pohl, S

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: 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.

• Assignee: C. Otto and Co. G.m.b.H.
• Patent Number(s): US 4049394
• OSTI ID: 7209428
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
CHEMICAL ANALYSIS
COAL GASIFICATION PLANTS
CONTROL SYSTEMS
ELECTROMAGNETIC RADIATION
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
INDUSTRIAL PLANTS
NONDESTRUCTIVE ANALYSIS
ON-LINE CONTROL SYSTEMS
ON-LINE SYSTEMS
RADIATION ABSORPTION ANALYSIS
RADIATIONS