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AssigneeThe Southern Company
InventorsPannalal Vimalchand, Guohai Liu, WanWang Peng
Estimating the term…
Disclosed are cooling and depressurization system equipment, arrangement and methods to cool solid particles from a coal gasifier operating at high temperature and pressure. Ash from the coal needs to be continuously withdrawn from a circulating fluidized bed gasifier to maintain the solids inventory in the gasifier. The system disclosed enables use of conventional materials of construction for heat transfer surfaces. The supports for the cooling surfaces are located on the lower temperature upper section of the primary cooler. The cooled solids along with the fluidizing gas exits the primary cooler to a secondary receiving vessel where the solids can be further cooled by conventional means. The fluidizing and entrained gas entering the secondary vessel is filtered and vented through a vent pressure control valve. The column of cooled solids in the secondary vessel is depressurized by a continuous depressurization system to low pressures which are sufficient for conveying the solids to silos for disposal. The system and methods proposed are equally applicable to many high temperature, high pressure processes that require cooling and depressurization of process solids.
A cooling system for cooling solids entering the cooling system at an average temperature of above approximately 1500° F., the cooling system comprising:
A system of cooling ash and solids from high temperature and high pressure coal gasification environment, the cooling system comprising:
A method of cooling solids at an average temperature of above approximately 1500° F. to an average temperature of less than approximately 600° F., the method comprising:
Dependencies are inferred from the claim text.