Patent ID: 9335100
Filing Date: 2016-05-10
CPC Classification: C10J,C10K,F23C,F23J,F28D

Claim Text:
1. A system of cooling ash and solids from high temperature and high pressure coal gasification environment, the cooling system comprising: a gasifier; a primary solids cooler; a downcomer connecting the gasifier and the primary solids cooler, and introducing the solids to the bottom of the primary solids cooler; a heat transfer system in the primary solids cooler to exchange heat between the solids and a cooling medium; a support in proximity of the top of the cooler for supporting the heat transfer system; a solids outlet in proximity of the top of the primary solids cooler and below the support; a secondary cooler; a gas-solids separation system at an inlet of the secondary cooler; a vent filter section in proximity of the top of the secondary cooler to limits solids over a predetermined size from entering a vent line; a pressure control vent valve to control the pressure difference between the primary solids cooler and the gasifier; and a continuous pressure letdown system, wherein the cooled solids are withdrawn from the secondary cooler through the continuous pressure letdown system that reduces the solids stream pressure to a desired level for conveying from the secondary cooler.