ASH AND SOLIDS COOLING IN HIGH TEMPERATURE AND HIGH PRESSURE ENVIRONMENT

Title:

ASH AND SOLIDS COOLING IN HIGH TEMPERATURE AND HIGH PRESSURE ENVIRONMENT

Document Type and Number:

WIPO Patent Application WO/2012/021404

Kind Code:

A3

Abstract:

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 Ash from the coal needs to be continuously withdrawn from a circulating fluidized bed gasifier to maintain the solids inventory in the gasifier.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.

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WO/2013/049325	PRODUCTION OF POLYCRYSTALLINE SILICON BY THE THERMAL DECOMPOSITION OF SILANE IN A FLUIDIZED BED REACTOR

Inventors:

VIMALCHAND PANNALAL (US)
LIU GUOHAI (US)
PENG WANWANG (US)

Application Number:

PCT/US2011/046765

Publication Date:

June 28, 2012

Filing Date:

August 05, 2011

Export Citation:

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Assignee:

SOUTHERN CO (US)
VIMALCHAND PANNALAL (US)
LIU GUOHAI (US)
PENG WANWANG (US)

International Classes:

B01J8/18; C10J3/56; F23G5/30; F23J1/02; F23J15/06

Foreign References:

US20090300986A1	2009-12-10
US4822761A	1989-04-18
JPH0626613A	1994-02-04
US4466808A	1984-08-21

Other References: