Method and apparatus for removal of last traces of soluble ash a

Details Method and apparatus for removal of last traces of soluble ash a Method and apparatus for removal of last traces of soluble ash a

1975-11-21

1977-11-22

Croyle, Carlton R.

Power plants

Combustion products used as motive fluid

Using special fuel or oxidizer

44 1B, F02C 326, C10L 900

Patent

active

040589765

ABSTRACT:
Solvent refined coal is treated with liquid water at a temperature of about 500.degree.-550.degree. F in a closed cylindrical vessel under the saturation pressure 665-1030 psig of water at that temperature and under gentle agitation to insure low shear liquid-solid contact for about 1/2 to 2 hours.
Surprisingly, the soluble ash, generally sodium or potassium salts, is leached out to bring the sodium content down from 50-60 parts per million to a value of less than 1 part per million which makes the product very suitable as a feed for direct firing in a gas turbine.
In addition the total ash content is reduced from a value of approximately 0.1% to a value less than 0.05% which means that in addition to reducing the quantity of sodium and potassium, there are other constituents of the ash which also have been removed.

REFERENCES:
patent: 2735265 (1956-02-01), Eastman
patent: 3660054 (1972-05-01), Rieve
patent: 3748254 (1973-07-01), Gorin

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