Gas: heating and illuminating – Processes – Fuel mixtures
Patent
1976-05-27
1977-04-12
Lindsay, Jr., Robert L.
Gas: heating and illuminating
Processes
Fuel mixtures
48202, 48206, 48210, 48DIG4, 201 31, 252373, C10J 316, C10K 120
Patent
active
040172724
ABSTRACT:
A process for continuously gasifying carbonaceous material using fluidizing medium and oxygen-containing gas, under controlled feed rates and certain delivery conditions, and under selective processing conditions to produce a product rich in carbon monoxide and hydrogen is provided. If desired, the product can be produced with increased amounts of methane. Gasification is conducted under pressure in a fluidized bed to produce a gaseous reaction product, and char solids are coproduced. Additional increments of oxygen-containing gas with steam is selectively introduced. The product is passed through a dilute-phase, maintained at certain temperatures, at a certain superficial velocity, and for a certain residence time. The presence of undesirable heavy hydrocarbon by-products is precluded. Char, in removal from the bottom of the bed, is contacted with steam or inert gas to recover sensible heat. Cooled product gas is provided having less than about 4 grains of solid per scf at certain conditions. Partially spent char is removed from the product for discharge or certain purposes. The product is cooled and is conducted in a heat recovery zone to recover heat values at least a part of which are used to produce steam, a portion of which is utilized in the process. The cooled product gas is conducted through a high efficiency, high pressure-drop type, a scrubber to remove fine partially spent char particles and provide a gas product containing minimal amounts of solids, a carbon monoxide content of at least about 10 percent (vol.), hydrogen, and a desired BTU content. The pressure in the gasifier is maintained by means of back-pressure control applied to the gas system at a point downstream of the gasifier.
REFERENCES:
patent: 3579302 (1971-05-01), Sefton
patent: 3607157 (1971-09-01), Schlinger et al.
patent: 3840353 (1974-10-01), Squires
patent: 3872025 (1975-03-01), Singleton
Anwer Jamil
Banchik Ira Norman
Bode Gerhard Wilhelm
Lemberg Werner
Sud Kuldip Kumar
Bamag Verfahrenstechnik GmbH
Lindsay, Jr. Robert L.
Yeung George C.
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