Instrumentation and controls experience at the IGT U-GAS Pilot Plant

Conference · Mon Jan 01 04:00:00 EST 1979

OSTI ID:5768374

Rehmat, A; Vora, M K; Sandstrom, W A

At the Institute of Gas Technology, several coal and char gasification pilot plant programs to produce low- and medium-Btu gas have been successfully conducted during the last 6 years. The U-GAS process consists of a single-stage fluidized-bed gasifier containing an ash agglomerator that achieves selective removal of high-ash-bearing material (agglomerates) and high carbon conversions. The three foot (0.091 m) diameter pilot plant reactor has produced quality medium-Btu gas at atmospheric pressure, over an operating temperature range of 1500/sup 0/ to 1950/sup 0/F (816/sup 0/ to 1066/sup 0/C). This paper reviews the instrumentation techniques utilized for measurement and control of process variables for successful start-up, steady-state operation, and upset recovery in the U-GAS Pilot Plant. These variables include fluid bed level, density, temperature, pressure and process gas input and product gas flow rates. Emphasis is placed on the instrumentation and control methods pertaining to the gasifier (bed height, temperature and pressure), selective ash removal and elutriated fines reinjection. The need for additional control features on demonstration-scale plants is also stipulated. To date, gasification tests have been successfully conducted using metallurgical coke breeze, bituminous coal chars, Montana subbituminous, Illinois No. 6, and washed and unwashed Western Kentucky No. 9 bituminous coals. U-GAS process tests have been completed to produce design data at 60 psia (413 kPa) for an Industrial Fuel Gas Demonstration Plant.

• OSTI ID: 5768374
• Report Number(s): CONF-790855-6
• 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
COAL GASIFICATION
CONTROL SYSTEMS
DIAGRAMS
FLOWSHEETS
FLUIDS
FUEL GAS
FUELS
FUNCTIONAL MODELS
GAS FUELS
GASES
GASIFICATION
INTERMEDIATE BTU GAS
MEASURING INSTRUMENTS
PILOT PLANTS
THERMOCHEMICAL PROCESSES
U-GAS PROCESS